Aldehydene
乙炔
🗣️ 情景例句
It's easy to pick something for my colleagues, but it's difficult for my boss.
给同事们的应该不难买，但是给老板的就难罗。
He that is ill to himself will be good to nobody.
不知自爱的人也不会爱别人。
And I succeeded, Zheng Jie.
我还是成功了，郑杰。