Police are warning the public be on the alert for suspicious packages.

They did their best to keep on their guard [ on the alert ] .

他们尽量保持 警惕.

Knowing that danger threatened , the sentry was on the alert.

因为知道危险势将发生, 这哨兵加意戒备.

These are the Chinese need to be on the alert.

这些都是需要中方警惕的.

Her fears had always been on the alert for an upheaval.

她日夜提心吊胆,严防突变.

The policemen were on the alert for an excaped convict.

一名逃脱犯令警方全面警戒.

They must be constantly on the alert for the enemy.

他们必须随时注意敌人.

The sentries were all on the alert.

哨兵们都警戒着.

He drew this conclusion on the analogy of yours.

他根据你的理论类推得出这个结论.

These are on the average better educated than those in the marketplace.

一般来说,这些年轻人比那些在市场上工作的人受教育的程度高一些.

On the average, the speed of the development of of urbanization is depended of the economy.

一般来说, 城市化的发展速度取决于经济发展速度,经济发展速度越快,城市化速度越快.

A parallel-inverter system based on the average current control scheme is studied in this paper.

研究了基于平均电流控制的逆变器并联系统.

Each household sold , on the average, two pigs.

平均每户 交售 了两口生猪.

Based on the average energy prices of the nearest 12 months.

以最近12个月的平均能源价格计算.

This statement is true only on the average.

这种说法只是大体上正确.

On the average , males score higher on tests that measure mathematical reasoning.

在测试数学推理 、 机械能力和解题技能方面.

This car runs 15 kilometers per liter on ( the ) average.

这辆车平均每公斤 ( 汽油 ) 跑15公里.

How much do profits, on the average, amount to?

那么, 平均而言, 利润的总量又有多少呢?

The dinners are eight dollars on the average.

晚餐平均是八元.

For seafarers paid on monthly basis : a three-month severance pay based on the average wage.

一按月给付报酬者,加给平均薪资三个月.

On the average, it costs about two thousand five hundred U S dollars.

一般来说, 大概要两千五百元美金.