straining例句
The volume of scheduled flights is
straining the air traffic control system.
定期航班的数量正让空中交通指挥系统不堪重负。
Today we are overpopulated,
straining the earth's resources.
现在我们人口过多，致使地球资源使用过度。
There is someone
straining his ears at the door.
门边正有人在竭力听着什么.