Lif
[化] 激光诱导荧光
🗣️ 情景例句
Good. Thank you. I'll be right down.
好，谢谢你。我马上下来。
And she?
她呢？
He was absent on Monday,Tuesday,Wednesday and Tuesday.How are you all keeping?
星期二、星期三和星期四没去上学。你们身体都好吗？