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- One should not run about aimlessly during an alert. 空袭警报期间不可到处乱跑。
- 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。
- The concrete walls are reinforced with steel rods. 混凝土墙是用钢筋加固的。
- 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。
- They have put the army on the alert. 他们已使军队进入戒备状态。
- Our defences must be reinforced against attack. 我们必须加强防御设施以抵御进攻。
- The alert leopard went up to a deer quietly. 警觉的豹子静悄悄地走近一只鹿。
- An alert listener will have noticed the error. 耳朵尖的人能听出这个错。
- 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。
- Alert to circumstances; attentive. 对周围环境敏感的; 留心的
- Troops are on the alert against any possible aggression. 军队戒备着可能的来犯。
- The boy was alert in answering the stranger's questions. 男孩很机敏地回答了陌生人的问题。
- Although he's over eighty his mind is still remarkably alert. 他虽已年过八十,但头脑仍然十分机敏。
- He reinforced his argument with many facts. 他用很多事实进一步证实了他的论点。
- Articles in Time's Medical Section often alert readers to unsuspected ailments. 《时代》周刊医药栏目里的文章常告诫读者对自己意想不到的疾病保持警惕。
- The regular troops need to be reinforced. 正规部队将需要增援。
- This old bridge should be reinforced immediately. 这座古老的桥梁应当立即进行加固。
- The cat is alert to every sound and movement. 那只猫对任何响动都很警觉。
- He centers his constructions around reinforced concrete or steel skeletons. 他的建筑主要是以钢筋混凝土或钢为骨架的。