Arsonation
引入胂羧基
🗣️ 情景例句
Any suggestions?
有什么建议吗？
Did you clean this yourself?
你自己亲自清理这个？
These satellites go round the earth and help us to learn more about the earth, the weather and other things.
这些卫星绕着地球转，帮助我们更好地了解地球、天气和其他情况。