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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。
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 maximum load for this lorry is one ton. 这辆卡车最大载重量是一吨。
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。
An alert listener will have noticed the error. 耳朵尖的人能听出这个错。
Our goal is to achieve the maximum of efficiency. 我们的目标是取得最高的效率。
This hall holds a maximum of seventy people. 这厅最多容纳七十人。
The dress is carefully styled for maximum comfort. 这服装精心设计，力求达到最大限度的舒适。
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。
A maximum or minimum value of a function. 极大值，极小值函数的最大值或最小值
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。
The monitor volume shall be left at75% of its maximum setting. 监视器的音量应该为其最大音量设置的75％。
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。
The maximum amount of credit extended to a customer. 最大透支额允许客人赊账的最大量
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。