... 严密的搜查 a narrow search 严密的调查 probe 严密的了望 sharp lookout ...
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keep a sharp lookout 严密监视 ; 戒备
keep sharp lookout 认真注意瞭望
Fix A Sharp Lookout For 密切注视
keep a sharp lookout for 小心提防
·2,447,543篇论文数据，部分数据来源于NoteExpress
He kept a sharp lookout for any strangers.
他警惕地守望着，不放过任何一个陌生人。
《牛津词典》
Keep sharp lookout for signals of vessel in distress and report.
保持对遇险船信号仔细瞭望并报告。
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Using all kinds of manners to keep a sharp lookout at all times when passing Gulf of Aden.
过亚丁弯时，在任何时侯都要用各种手段进行有效正规了望。
They uncovered "no smoking guns" responsible for the leak and consequently kept a sharp lookout for any icy flecks that might appear from the massive frame that holds the solar panels on the left side.
WSJ: Spacewalkers Replace Space Station Pump
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