Dehydrobiotin
去氢生物素
🗣️ 情景例句
I wonder whether I might ask you a question.
我是否可以问你一个问题？
We want to purchase Chinese tea. Please send us your best offer by fax indicating origin packing, quantity available and the earliest time of shipment.
我们欲购中国茶。请用电传给我们报最好价，并说明产地、包装、可供数量及最早发货日期。
May I use your pen?
我可以用你的笔吗？