Biotinsulfone
生物素砜
🗣️ 情景例句
Is smoking allowed on the train?
火车上允许吸烟吗？
Would you please have dinner ready for me?
可以请你为我准备晚餐吗？
Were you in San Francisco at the time of the big earthquake in 1989?
1989年旧金山大地震时，你在那儿吗？