Ketonic link(age)
[化] 羰基键
🧩 词语组成解析
酮的
🗣️ 情景例句
Do you have anything to declare for customs?
有什么要申报呀？
Please give me a hand.
请帮我个忙。
I've never met him but I've talked to him on the net.
我没见过他，但我和他在网上聊过天。