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。
When you type a letter, the writing appears on a screen in front of you and is recorded onto a computer disk.
当你打一封信时,字迹出现在你前面的屏幕上并顾在电脑的磁盘里。