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- The dog kept a vigilant guard over the house. 这只狗警惕地守护着这所房屋。
- One should not run about aimlessly during an alert. 空袭警报期间不可到处乱跑。
- Alert to danger; an alert bank guard. 警惕危险;警觉的银行保安人员
- She is always on the alert for some new calamity. 她总是保持警觉以防某种新的灾难。
- Keep on the alert; we're due for an inspection. 提防着点,轮到检查我们了。
- Be sure to be watchful or alert. 必须留神,千万要提防。
- He urged them to guard against conceit. 他要求他们防止骄傲自满。
- He bribed his way past the guard and escaped. 他买通看守而逃之夭夭了。
- I was off my guard and made no suitable reply. 我没提防,因此没有作出适当的回答。
- The guard of honor headed up the whole parade. 仪仗队走在游行队伍的最前头。
- They have put the army on the alert. 他们已使军队进入戒备状态。
- The alert leopard went up to a deer quietly. 警觉的豹子静悄悄地走近一只鹿。
- Please guard against pickpockets on the bus. 在公共汽车上要谨防扒手。
- The soldier volunteered for guard duty. 那个战士自告奋勇去站岗。
- An alert listener will have noticed the error. 耳朵尖的人能听出这个错。
- The guard had orders to shoot on sight. 哨兵奉命见人就开枪。
- Be on your guard, I conjure you. 千万要警惕呀,我恳求你。
- Four soldiers stood guard over the coffin. 四个士兵守卫灵柩。
- The district was put on red alert during a terrorist bomb scare. 这个地区在得到恐怖主义者轰炸后作了应急准备。
- The guard should be watchful during the night. 警卫在黑夜里也应该警醒。