Electrophotometer
[电] 光电计
🗣️ 情景例句
It was for a good reason.
你今天早走是有原因的。
She is free any time you need help.
你需要帮忙时，请随时向她求助好了。
and at the most critical juncture we took turns in watching that point.
在最紧急的时刻，我们轮流监视那段河流的险情。