Micropicnometer
[化] 微量比重瓶
🗣️ 情景例句
Will dinner be served on this train?
火车上供饭吗？
Quick feet and busy hands fill the mouth.
手勤脚快，嘴里吃饱。
Is it cold or warm in autumn?
秋季的天气是冷还是暖呢？