Sorbierite
山梨醇
🗣️ 情景例句
I'm sure I did.
我确信我安排了什么事。
He concentrated solely on law studies.
他把全部精力只用于攻读法律。
Imagine a pen attached to the weight in such a way that its point rests upon a piece of paper on the floor.
假定把一支笔拴在重物上，笔尖落在地板上的一张纸上，