late 15c., from Middle French vigilant or directly from Latin vigilantem (nominative vigilans) "watchful, anxious, careful," present participle of vigilare "to watch, keep awake, not to sleep, be watchful," from vigil "watchful, awake" (see vigil). Related: Vigilantly.
雙語例句
1. He warned the public to be vigilant and report anything suspicious.
他警告公眾要提高警惕，遇到任何可疑情況都要報告。
來自柯林斯例句
2. A pilot must remain vigilant at all times.
飛行員必須隨時保持警惕。
來自《權威詞典》
3. He has to learn how to remain vigilant through these long nights.
他得學會如何在這漫長的黑夜里保持警覺.
來自《簡明英漢詞典》
4. The dog kept a vigilant guard over the house.
這只狗警醒地守護著這所房屋.
來自《現(xiàn)代英漢綜合大詞典》
5. All but one of these letter bombs had been intercepted by vigilant post office staff.