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alert的现在完成时为：alerted...
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The armed forces were on high alert to guard against any retaliation.武装部队保持高度戒备，以防发生任何报复行动。The bank is alert to the danger.银行充分意识到了危险。All the Plymouth hospitals are on red alert.普利茅斯所有的医院都处于紧急状态之中。...
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adj.警觉的，警惕的，注意的，思维敏捷的，活泼的n.警报，警戒状态vt.向…报警...
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alert的音标：alert的英式发音音标为：[ə'lɜ:t]alert的美式发音音标为：[ə'lɜ:rt]...
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alert的第三人称单数（三单）为：alerts...
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Due to a security alert, this train will not be stopping at Oxford Circus.由于安全戒备的原因，该次列车在“牛津街口广场”站将不停留。Matcham steady and alert, at a sign from Dick, ran along the thwarts and leaped ashore.麦青机警 、 镇静地照着狄克向他做的手势,急急地沿着船上的座...
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alert的反义词有：torpid, asleep, languid, supine, heedless, listless, sluggish, lethargic, slow, dull, drowsy。adj.alert的反义词（警觉的;机警的,机敏的;灵活的）：torpid, asleep, languid, supine, heedless, listless, sluggish, lethargic, slow, dull。...
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alert的现在进行时为：alerting...
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alert的近义词/同义词有：nimble, ready, quick, vigilant, clear-witted, awake, job, the, lively, on, watchful, one's, prompt, wide, toes, attentive, ready, torpid, bright, job, brilliant, signal, cautious, lively, prompt, circ...
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alert的一般过去时为：alerted...