答案1
我画了第一张图并附上解释性注释——你应该可以从这里继续往下看——当你问问题时,请上传一个最小工作示例(MWE),如网站上所述——这将吸引更多的观众来寻求帮助
平均能量损失
\documentclass[tikz, margin=1cm]{standalone}
\usepackage{siunitx, makecell}
\usetikzlibrary{positioning,calc, arrows.meta}
\usetikzlibrary{decorations.pathreplacing}
\begin{document}
\begin{tikzpicture}
\draw[->, -Latex, line width=1pt] (0,0)node(a){} -- (12,0) node (b) {} ;%draws a horizontal line
\foreach \x [count=\i] in {1,2,...,5}%
{
\draw[line width=1pt] (\i*2,-2mm) node[](n\i) {} -- ++(0,4mm);%draws the five ticks in the horizontal line
}
\draw[%draws the brace on the underside
decorate,
decoration={%
brace,
amplitude=6pt}]%
([yshift=-1em]n4.south)--
node[below=0.25cm]{\texttt{\tiny \makecell{${t_E}$\\reading a book}}}
([yshift=-1em]n1.south);
\draw[%draws the upper brace
decorate,
decoration={%
brace,
amplitude=6pt}]%
([yshift=1em]n2.north)--
node[above=0.25cm]{\texttt{\tiny \makecell{${t'}$\\yesterday}}}
([yshift=1em]n3.north);
\node[above=2em of n5] (n6) {${t^0/t^s}$};% for the suffix over the fifth tick
\end{tikzpicture}
\end{document}
\end{document}