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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。
- A funny thing happened in the subway yesterday. 昨天地铁里发生了一件有趣的事。
- Do you ever take the subway alone late at night? 你有没有在深夜单独乘过地铁？
- 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。
- The gang jumped an old woman in the subway. 一伙歹徒在地下人行道突然袭击一老妇人。
- Shall we take a cab there and come back by subway? 我们坐出租车去再乘地铁回来好吗？
- Use the subway to cross the road. 请走地下通道穿越马路。
- He queued up to buy his subway ticket of 20 penny. 他排队买了一张20便士的地铁车票。
- 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。
- He bought some tokens for the subway. 他买了一些乘地铁用的辅币。
- An alert listener will have noticed the error. 耳朵尖的人能听出这个错。
- Be this right for the subway station? 去地铁站从这儿走，对吗？
- Homeless people forced to panhandle in subway stations. 无家可归的人们被迫在地铁站里乞讨。
- 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。
- Foreign companies were invited to bid for the new subway. 一些外国公司应邀参加了承建该地下铁路的投标。
- 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。
