非法入境者的统计也是一大挑战。

Illegal immigration poses a particular challenge.

这两个女人都雇佣了非法入境者来照看孩子。

Both women had hired illegal aliens for child care.

年内，共有19584名非法入境者被逮捕和遣返原居地，而一九九六年则有24408名。

In 1997, 19584 illegal immigrants were apprehended and repatriated, compared with 24408 in 1996.

有20英里宽的天堑为壕沟，使得英国不必像世界上大多数国家那样担心非法入境者。

PROTECTED by a 20-mile-wide moat, Britain need not worry as much as most countries about illegal border-hoppers.

正如新闻所报道，内政部在其未能成功控制非法入境者这一消息走漏风声后促成了此事的调查。

As this story details, the investigation was instigated by Home Office civil servants after a blush-making leak about the department's failure to control illegal immigrants.