vi.经营奔跑运转
vt.管理，经营运行参赛
n.奔跑赛跑趋向奔跑的路程过去式 ran，过去分词 run
现在分词 running，第三人称单数 runs，复数 runs
The first test run of the equipment was a complete success.
设备的第一次试跑获得了圆满成功。
2
Man goes to the higher position， water runs to the lower place.
人往高处走，水往低处流。
3
It's easier to buy a car than to run it.
买车容易养车难。
