Bilidien
胆汁二烯, 二烯胆色素核
🗣️ 情景例句
When was your reservation?
您预定的是什么时候？
Do I need a reservation for the dining car?
我需要预订餐车吗？
Please be aware that this is a crucial issue to us.
请了解这一点对我们至关重要。