Tofms
[化] 飞行时间质谱仪
🗣️ 情景例句
Mary, I'm glad you called me.
Mary，很高兴你给我打电话。
His name is John Smith.
他叫约翰、史密斯。
Excuse me. Where's the nearest post office, please?
请问，最近的邮局在哪儿？