Oleorefractometer
油折射计
🗣️ 情景例句
His collection of paintings is most impressive.
他的绘画收藏令人叹为观止。
All work and no play make Jack a dull boy.
尽量学，尽情玩。
First turn the gas off and cover the pan.
首先，把煤气关上，盖上油锅。