K stoff
[医] 氯甲酸氯甲酯
🗣️ 情景例句
No. Isn't it wonderful?
不， 这不是很美妙吗？
It is easy to open a shop but hard to keep it always open.
开设店铺易，维持常开难。
and he had seen there evidence enough to overthrow Aristotle and Ptolemy together.
观察到的论据足以把亚里士多德和托勒密一起推翻。