Echinenone
海胆酮, β-胡萝卜素-4-酮
🗣️ 情景例句
I can't tell you how sorry I am.
我真的是很抱歉。
How much is this land per acre?
每英亩地要多少钱？
With a smile the man from downstairs said: I'm sorry to trouble you, comrade.
“对不起，打扰你了，同志。”