1. She stressed the need for constant vigilance. 她强调必须时常保持警惕。
2. Constant vigilance is necessary in order to avoid accidents. 为了避免意外事故，必须经常保持警惕。
3. It seems to me they still have some fight left in them. We shouldn't relax our vigilance. 他们余勇可贾，我们不能放松警惕。
4. The Committee of Vigilance promptly arrested the Knapp brothers and sent them to the Salem Gaol, their cells not far from those occupied by the Crowninshields. 警戒委员会迅速逮捕了克纳普兄弟，把他们也扔进了萨勒姆监狱，囚禁这二人的牢房与克劳宁希尔德兄弟的牢房相距不远。
5. The organism is more awake, more vigilant; this increased vigilance results in the apprehension of ever more subtle signals as the organism becomes more sensitive to its surroundings. 有机体更清醒，更警觉；随着有机体对周围环境变得更加敏感，这种提高的警惕性导致对更细微信号的理解。
