Tdr
[计] 时间域反射仪
🗣️ 情景例句
Donald passed away a couple of years ago.
Donald几年前去世了。
The whole thing was held up about half an hour.
整个事情耽搁了约半小时。
Houses -- often three storeys high -- were built of stone.
房子一般有3层楼高，用石块修建。