Pentacene
并五苯
🗣️ 情景例句
We're also very glad to have practical business dealings with you.
我们也很高兴能和贵公司建立实质性的业务联系。
My brother came in,changed his clothes,and went out again.
我的兄弟进来了，换掉了他的衣服，并再去外面了。
How many do you need?
你需要多少？