Muchematein
[醫(yī)] 明礬蘇木精[染液]
??? 情景例句
Why advanced?
為什么是高級的？
One enemy can do more hurt than ten friends can do good.
十個朋友做的好事抵不上一個敵人造成的危害。
Imagine a pen attached to the weight in such a way that its point rests upon a piece of paper on the floor.
假定把一支筆拴在重物上，筆尖落在地板上的一張紙上，