Plumbane
烃基铅
🗣️ 情景例句
No, Mom. We had a great time.
不， 妈妈。我们玩得很高兴。
Would you please have dinner ready for me?
可以请你为我准备晚餐吗？
Mr. Smith knew Jack didn't look at the others because he was nervous.
史密斯先生知道杰克不敢看别人是因为紧张。