Micropycnometer
微型比重瓶
🗣️ 情景例句
It is. That's why we bought it for you.
是的。这就是我们买给你的原因。
Shall I come by early to help you get ready?
我提早一点来，帮忙准备宴会好吗？
My pen dropped on the ground when I was walking in the park.
当我在公园里散步的时候，我的钢笔掉到地上了。