欢迎来到“零移⺠美国”

难句分析：Preventing innovators and workers from entering the country not only takes aim at a pillar of America's success-it does so at a time when the native-born workforce is fast greying.

preventing ... from 阻止某人做某事 take aim at sth 把目标对准某事 SO 指 preventing ... from

pillar 柱子，引申为 国民经济或国家支柱；grey 灰色，引申为头发变灰白，即变老

阻止创新者和劳工进入美国，不仅是针对美国成功的关键因素-而且是发生在本土劳动力正迈入老龄化的时候。