名词解释：“三非人员”是指“非法入境、非法居留、非法就业”的人。你知道用英语怎么表达吗？

Beijing launched a 100-day crackdown against illegal immigration, residence and employment of foreigners yesterday. This is the first time that China has openly targeted illegal aliens in its capital.

A total of 52.11 million foreigners entered and left China in 2010, 2.33 times as many as 10 years ago. Last year, China cracked down on about 20,000 illegal immigrants. Apparently, China is quickly becoming a new destination for illegal immigrants.

北京开展百日专项行动，集中清理在京的非法入境、非法居留、非法工作的外国人。这是中国首都地区第一次公开、集中清理“三非”外国人。

中国2010年外国人入出境共计5211万人次，是10年前的2.33倍。2011年中国共清理约2万“三非”外国人。显然，中国正快速成为新的“三非”目的地国。

【讲解】

文中的“crackdown against illegal immigration, residence and employment of foreigners”就是指清理“三非”，“三非”指非法入境(illegal immigration)、非法居留(illegal residence)、非法工作(illegal employment)。“crackdown”是指“镇压、打击、制裁”，如：a crackdown on crime 打击犯罪;“clampdown”也是指“制裁, 严禁, 取缔”等，如：a clampdown on drug dealers 取缔毒贩。