suck someone/something dry idiom (also suck the life out of someone/something)
把（某人或物）吸干;榨干（某人或物的）价值
to remove all useful, valuable qualities or possessions from a person, thing, or place
That firm sucks its new programmers dry after five years and then fires them. 过五年，等到那个公司吸干了新程序员的才华以后就会解雇他们。
Big cities suck the surrounding towns dry of local talent. 大城市吸干了周围城市的本地人才。
Out-of-town stores have sucked the life out of the city centre. 城外的店铺让市中心失去了活力。