🗣️ 情景例句
We finished addressing over three hundred envelopes.
我们写了三百多个信封地址了。
I'm happy when I skate.
溜冰真是快乐呀。
Once the oxygen content of the air had risen to 25% it was ready to burn.
一旦氧气在空气中的含量达到25%，它就要燃烧。