Interstep
级间
🗣️ 情景例句
If we're all prepared to recycle paper, thousands of trees could be saved every day.
如果纸能被循环利用，那么每天千千万万的树木就可得以挽救。
Friends are lost by calling often and calling seldom.
交往过密过疏，都会失去朋友。
They lived there before they came to China.
在他们来中国前。