In 1971, shortly after John Lennon arrived in New York on a visa, he began associating with radical anti-war activists, and the FBI put Lennon under surveillance.
1971年，列侬带着美国签证到达纽约，与积极反战人士会面不久后，FBI便开始监视他。
Bond markets are nervous: Moody's, a ratings agency, this week put France's AAA rating under surveillance and spreads over German Bunds have widened to 19-year highs.
债券市场也很紧张：评级机构穆迪公司在本周将法国的AAA评级纳入监督之中，并且整个德国国债扩展至19年来的最高点。
Under the situation at present, the network model about surveillance, field investigation and treatment were put forward when the severe infectious disease prevailed.
提出了目前情况下，重大传染病流行时，疫情监测、现场调查和现场处理的网络模式。
Under the situation at present, the network model about surveillance, field investigation and treatment were put forward when the severe infectious disease prevailed.
提出了目前情况下，重大传染病流行时，疫情监测、现场调查和现场处理的网络模式。
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