Echinenone
海胆酮, β-胡萝卜素-4-酮
🗣️ 情景例句
Yes, I know that.
是的 ，我知道。
I know the boy whose father is a medical doctor.
我知道那个男孩的父亲是医师。
he instructs the bank to debit his account only in respect of cheques drawn by himself.
嘱咐银行他的存款只能凭他本人签字的支票来提取。