1.slip through the cracks 漏网之鱼
Too many young people slip through the cracks in the healthcare system.
没有被医保系统覆盖到的年轻人太多太多了4*y5jFB5i&2,w+y。

2.seek out 一直寻找，直到找到为止
Ellen spent the day in the hills and sought me out when she returned.
艾伦在山里找了一整天，结果在回来的路上找到了我kr7c9DubLed[OhuR5#V。

3.Jane Doe 无名氏
She, or Jane Doe or whatever it is that you call her, is married.
那个女人，那个张三李四王二麻子或随便你怎么称呼，已经结婚了odsG.uFvo+nIl。

4.at the forefront of 在……的最前沿
China is at the forefront of this process, with an economy that has tripled in size in a decade.
中国正是这一进程的领军力量——十年里，其经济规模就已经增长了两倍Vu*7GzkUq)]UG。