Macrocycle
(包含15个原子以上的)大环
🗣️ 情景例句
Excuse me? What did you say?
对不起，你说什么？
This is a receipt.
这是一张收据。
'I found this outside this gentleman's room,' she said.
“这是我在这位先生的房门外捡到的，”她说。