Aldehydene
乙炔
🗣️ 情景例句
So far, you're all tied.
到现在为止 你们不分胜负。
Do you have some change?
你有零钱吗？
Ready? Go! Mr. Hu shouted, and the boys started to run.
“预备--跑！”胡先生喊道，男孩子们开始跑。