Diphenylethlene
二苯基乙烯
🗣️ 情景例句
I'm extremely sorry for the delay.
对此延误，我深感抱歉。
May I smoke?
我能抽烟吗？
Lucy ran home at once. Her mother saw her when she arrived.
露西马上跑回家。到家时母亲看见了她。