shake-down：某种新设备器材的试用以及操作人员的培训。可泛指电脑、汽车、机器等一切新产品的试用。例句中shake-down表试飞。
 

【例句】

This gang tried to shake down the shopkeeper for $ 500 a month with a threat to set fire to his shop. But two cops hiding in the back came out with guns and caught them all.

这伙歹徒试图敲诈老板每月五百美元：他们威胁说否则就烧毁他的店铺。但是两名埋伏在后面的警察持枪出来把他们一网打尽。
 

Two test pilots and some aircraft engineers are flying that new plane on a shake-down flight. If everything is OK, it'll be put into regular passenger service.

两名试飞员和几位飞机制造工程师在为那架新飞机作试飞，如果飞机运作一切正常，它将被投入日常航运。