为什么 gpg 在 --list-keys 和 --list-secret-keys 中显示不同的 uid？

Question

我已使用--edit-key命令添加了一个新的uid，并撤销了一个旧的uid。

这是我的输出（已经用“uidx”替换电子邮件）：

▶ gpg --list-keys; gpg --list-secret-keys 
/home/xxxx/.gnupg/pubring.gpg
-----------------------------
pub   2048R/A6573CCA 2012-07-26
uid                  uid1
uid                  uid2
uid                  uid3
uid                  uid4
uid                  [jpeg image of size 3757]
sub   2048R/88364032 2012-07-26

/home/xxxx/.gnupg/secring.gpg
-----------------------------
sec   2048R/A6573CCA 2012-07-26
uid                  An revoked uid5 here.
uid                  uid2
uid                  uid1
ssb   2048R/88364032 2012-07-26