警惕的英文：
vigilant
alert
on guard
raise one's guard

參考例句：
  • On guard
    警惕,防范
  • Look out
    留神,注意,提防,警惕
  • He must [should] have a long spoon that sups with the devil.
    同壞人打交道必須提高警惕。
  • Be on your guard! He's a sly old fox.
    提高警惕！他是一個(gè)狡猾的老狐貍。
  • In addition the vigilance of the enemy was undoubtedly relaxed owing to the unfavourable phase of the moon
    此外，敵人由于月色不佳，當(dāng)然也放松了警惕。
  • a loathsome Dublin politico who is on the qui vive ists(bJulian Moynahan)
    一位時(shí)刻警惕…恐怖分子的可惡的都柏林政客(b朱利安·莫伊納漢)
  • Without any doubt, we should adopt for and facilitate the former scenario and guard against the latter.
    毫無(wú)疑問(wèn)，我們應(yīng)選擇并推進(jìn)前一種趨勢(shì)，警惕并控制后一種趨勢(shì)。
  • Mike, after they frisk you in the car and find you’re clean, they won’t be too worried about you.
    邁克，你上車后，他們搜了你的身，證實(shí)你沒(méi)有帶槍，他們就會(huì)對(duì)你放松警惕。
  • The way to be safe is never to feel secure
    警惕才能安全
  • An alert or watchful person; a guardian.
    機(jī)警的或警惕的人;守衛(wèi)者。
vigilant是什么意思：
adj. 警惕的，警戒的，注意的
  • Be vigilant in peace time.
    居安思危。
  • These are not the only points to which you look for vigilant watchfulness
    這些并非是諸位選擇機(jī)警的看守者的唯一條件。
  • You cannot afford to relax your vigilance for a moment.
    警惕性是一刻也不可放松的。
alert是什么意思：
adj. 警覺(jué)的；思維敏捷的
v. 向…報(bào)警；使警覺(jué)，使意識(shí)到
n. 警戒，警惕；警報(bào)
  • Suddenly the combat alert sounded.
    突然戰(zhàn)斗警報(bào)響了。
  • conflict alert (CA)
    碰撞警告
  • She was very brisk and alert.
    她完全是一副干脆利落、精神抖擻的神情。
guard是什么意思：
n. 衛(wèi)兵；護(hù)衛(wèi)隊(duì)；守衛(wèi)；警戒；防護(hù)裝置；列車長(zhǎng)
v. 看守；監(jiān)視；控制；防范
  • guarding position
    防守位置
  • a guarded answer
    謹(jǐn)慎的回答
  • ...the Irish Guards
    ...愛(ài)爾蘭近衛(wèi)團(tuán)

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