我可以看到系统似乎无法访问源服务器上不存在的这些包，但是......尝试在更新设置 GUI 中更改为不同的包似乎并没有真正改变它们。
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/g/glibc/libc6_2.37-0ubuntu2.1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/g/gcc-13/gcc-13-base_13.1.0-2ubuntu2%7e23.04_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/g/gcc-13/libgcc-s1_13.1.0-2ubuntu2%7e23.04_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/o/openssl/libssl3_3.0.8-1ubuntu1.2_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/g/gcc-13/libstdc%2b%2b6_13.1.0-2ubuntu2%7e23.04_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/libw/libwebp/libwebp7_1.2.4-0.1ubuntu0.23.04.2_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/t/tiff/libtiff6_4.5.0-5ubuntu1.2_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/f/freetype/libfreetype6_2.12.1%2bdfsg-4ubuntu0.1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/libx/libx11/libx11-6_1.8.4-2ubuntu0.3_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/libx/libx11/libx11-xcb1_1.8.4-2ubuntu0.3_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/libx/libxpm/libxpm4_3.5.12-1.1ubuntu0.1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/libc/libcap2/libcap2_2.66-3ubuntu2.1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/libs/libssh/libssh-4_0.10.4-2ubuntu0.1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/n/ncurses/libncurses6_6.4-2ubuntu0.1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/n/ncurses/libncursesw6_6.4-2ubuntu0.1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/n/ncurses/libtinfo6_6.4-2ubuntu0.1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/libx/libxml2/libxml2_2.9.14%2bdfsg-1.1ubuntu0.1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/a/avahi/libavahi-client3_0.8-6ubuntu1.23.04.1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/a/avahi/libavahi-common3_0.8-6ubuntu1.23.04.1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/a/avahi/libavahi-common-data_0.8-6ubuntu1.23.04.1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/g/gcc-13/libgomp1_13.1.0-2ubuntu2%7e23.04_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch https://mirror.isoc.org.il/pub/ubuntu/pool/universe/s/speexdsp/libspeexdsp1_1.2.1-1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/g/gcc-13/libatomic1_13.1.0-2ubuntu2%7e23.04_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/l/llvm-toolchain-15/libllvm15_15.0.7-3ubuntu0.23.04.1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/g/gcc-12/gcc-12-base_12.3.0-1ubuntu1%7e23.04_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/g/gst-plugins-base1.0/libgstreamer-plugins-base1.0-0_1.22.1-1ubuntu1.1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/c/cups/libcups2_2.4.2-3ubuntu2.5_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch https://mirror.isoc.org.il/pub/ubuntu/pool/universe/s/svt-av1/libsvtav1enc1_1.4.1%2bdfsg-1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch https://mirror.isoc.org.il/pub/ubuntu/pool/universe/libv/libva/libva-drm2_2.17.0-1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch https://mirror.isoc.org.il/pub/ubuntu/pool/universe/libv/libva/libva-x11-2_2.17.0-1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch https://mirror.isoc.org.il/pub/ubuntu/pool/universe/libv/libva/libva2_2.17.0-1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch https://mirror.isoc.org.il/pub/ubuntu/pool/universe/o/ocl-icd/ocl-icd-libopencl1_2.3.1-1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch https://mirror.isoc.org.il/pub/ubuntu/pool/universe/f/ffmpeg/libavcodec59_5.1.2-3ubuntu1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch https://mirror.isoc.org.il/pub/ubuntu/pool/universe/f/ffmpeg/libswresample4_5.1.2-3ubuntu1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/libw/libwebp/libwebpmux3_1.2.4-0.1ubuntu0.23.04.2_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch https://mirror.isoc.org.il/pub/ubuntu/pool/universe/a/aom/libaom3_3.6.0-1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch https://mirror.isoc.org.il/pub/ubuntu/pool/universe/libg/libgsm/libgsm1_1.0.22-1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/libr/librsvg/librsvg2-common_2.54.5%2bdfsg-1ubuntu2.1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/libr/librsvg/librsvg2-2_2.54.5%2bdfsg-1ubuntu2.1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/libv/libvpx/libvpx7_1.12.0-1ubuntu1.2_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch https://mirror.isoc.org.il/pub/ubuntu/pool/universe/z/zvbi/libzvbi0_0.2.41-1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch https://mirror.isoc.org.il/pub/ubuntu/pool/universe/f/ffmpeg/libavutil57_5.1.2-3ubuntu1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/c/curl/libcurl4_7.88.1-8ubuntu2.3_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/g/gst-plugins-base1.0/gstreamer1.0-plugins-base_1.22.1-1ubuntu1.1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/g/gst-plugins-good1.0/gstreamer1.0-plugins-good_1.22.1-1ubuntu1.2_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/g/gst-plugins-good1.0/libgstreamer-plugins-good1.0-0_1.22.1-1ubuntu1.2_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/g/gst-plugins-base1.0/gstreamer1.0-x_1.22.1-1ubuntu1.1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch https://mirror.isoc.org.il/pub/ubuntu/pool/universe/w/wine/libwine_8.0%7erepack-4_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch https://mirror.isoc.org.il/pub/ubuntu/pool/universe/w/wine/wine32_8.0%7erepack-4_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch https://mirror.isoc.org.il/pub/ubuntu/pool/universe/i/intel-gmmlib/libigdgmm12_22.3.4%2bds1-1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch https://mirror.isoc.org.il/pub/ubuntu/pool/universe/i/intel-media-driver/intel-media-va-driver_23.1.2%2bdfsg1-1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/restricted/n/nvidia-graphics-drivers-525/libnvidia-compute-525_525.125.06-0ubuntu0.23.04.1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch https://mirror.isoc.org.il/pub/ubuntu/pool/universe/m/mesa/mesa-va-drivers_23.0.4-0ubuntu1%7e23.04.1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch https://mirror.isoc.org.il/pub/ubuntu/pool/universe/libv/libva/va-driver-all_2.17.0-1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
任何帮助都值得感激！