My research has found that any new smell, even one associated with relaxation, like lavender, can make you more alert and vigilant.
我的研究表明：在闻到的任何以前从未闻过的气味的时候，哪怕是像薰衣草那样能让你感到放松的气味，人都会警惕起来。
Contagious yawning is thought to be an evolved mechanism for keeping groups alert so they "remain vigilant against danger," Gallup said.
呵欠传染被认为是进化出来用于保持群体的警惕性使群体“在危险面前保持警觉，”盖洛普说。
The alert is expected to urge American citizens in Europe to be vigilant, especially when in public places such as public transportation, airports, and tourist sites, officials said.
该警告旨在使欧洲的美籍人员保持警惕，尤其是在公共场合，如公交车站，机场和旅游景点。
This is all the more reason to be alert and vigilant about what is happening on this front.
这就是对这一前沿正在发生的事情保持警惕的更多原因。
The key, security experts say, is to stay alert and vigilant, preventing an attack before it happens and that, in turn, demands good intelligence.
安全专家表示，关键是保持警惕，在袭击发生之前将它们阻止。反过来，这需要充分的情报。
That sobering moment taught Sully to be vigilant and alert. For a pilot, one simple mistake could mean death.
这个沉重的时刻教会了萨伦伯格提高警觉。对一名飞行员来说，一个微小的失误可能就意味着死亡。
Parts of Malmo have been on high alert since the shootings began in October last year, and police are still urging people to stay vigilant.
自去年十月份枪击事件开始以来，马尔默的部分地区保持高度警戒。
Conclusion Keeping vigilant alert, observing dynamically as well as appropriate operative intervention are effective to improve the prognosis of acute acalculous cholecystitis.
结论对该病保持警惕性，动态观察病情变化，必要时积极进行手术治疗是改善其预后的有效方法。
Conclusion Keeping vigilant alert, observing dynamically as well as appropriate operative intervention are effective to improve the prognosis of acute acalculous cholecystitis.
结论对该病保持警惕性，动态观察病情变化，必要时积极进行手术治疗是改善其预后的有效方法。
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