Tdr
[计] 时间域反射仪
🗣️ 情景例句
Every cloud has a silver lining.
乌云背后是银边，否极泰来。
If you run after two hares,you will catch neither.
同时追两兔，一只也难捕。
I'm sorry,I'm don't know.
很抱歉，我不知道。