Sectrometer
[机] 真空管滴定计
🗣️ 情景例句
It was a pleasure having you. Please come again.
和你在一起我们非常荣幸，请有空常来。
I was writing some letters to friends of mine.
我在写一些信给我的朋友。
Are they under the chair?
他们在椅子下面吗？