Alkyle
[医] 烃基化物
🗣️ 情景例句
Well, that must be him.
噢，一定是他。
Please go over it and see if everything is in order.
请过目一下，看看是否一切妥当。
and then there are three thousand million other Milky Ways, or galaxies, in the universe.
况且在宇宙中还有30亿个天河，即银河系。