Permeaselectivity
选择渗透性
🗣️ 情景例句
This dance show is very strange indeed.
这场舞蹈表演真是奇怪。
I'd like to explain what makes this factory special.
我要向你说明本工厂的特性。
why have we had no visitors from outer space yet?
那么我们为什么还未见到外层空间来访的客人呢？