Methanophone
瓦斯警报器
🗣️ 情景例句
You need to complete some forms before the class.
上课之前你得填一些表格。
Stop being so indecisive!
别再婆婆妈妈了！
I find young people exciting.They have an air of freedom,
我觉得年轻人令人振奋，无拘无束。