spied
[spaɪd]
v.
看见，发现（ spy的过去式和过去分词 ）;
当间谍;
从事间谍活动;
搜集情报;
例句:
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He also took exception to having been spied on.
他也讨厌被暗中监视。
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The agent spied for East Germany for more than twenty years.
该特工人员为东德做了20多年的间谍。
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He was walking down the street when he spied an old friend.
他正沿街走着，突然看见了一位老朋友。
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He spied a corridor nearby and headed toward it.
来自WSJ
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He spied at them...through a glass like a voyeur.
来自I. Watson
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Many were spied on, tortured and imprisoned.
来自VOA