Acetyltryptophan
乙酰氨酸
🗣️ 情景例句
I want to send this letter to China, by air mail.
我想把这封信航空邮到中国。
It's nothing. Don't mention it.
区区小事，何足挂齿。
The 'taxi' is a small Swiss aeroplane called a 'Pilatus Porter'.
这辆“出租汽车”是一架小型瑞士飞机，叫“皮勒特斯。波特“号。