Tofms
[化] 飞行时间质谱仪
🗣️ 情景例句
Please sit down, Mr. Mark.
请坐吧，马克先生。
They don't know when the wedding will be.
他们不知道婚礼将是什么时候。
This year we are going to help them with the rice harvest.
今年我们准备去帮他们收水稻。