Trimethyl
三甲基色氨酸, 刺桐子氨酸
🗣️ 情景例句
She was in our class.
她和我们同班。
No root,no fruit.
无根就无果。
He sent the journalist two more faxes, but received no reply.
他给记者先后发去两份传真，但对方毫无反应。