Arenes
[化] 芳烃
🗣️ 情景例句
Typing is easy once you get the hang of it.
一旦你掌握诀窍，打字就很简单。
If he doesn't help him, I will.
如果他不，我将帮助他。
Should we invite Susan to the party?
要请苏三参加舞会吗？