加强检测的英文：
step up surveillance

step是什么意思：
n. 脚步；步态，步伐；步骤；措施；阶段，等级；台阶，平台；舞步
v. 踩，踏；跨步，行走；跳舞；使成阶梯状

step by step welding
跨步焊法

It is a step class.
这是踏板操训练班。

They are not in step with the times.
他们跟不上时代的步伐。

the execution of steps
舞步表演

To work step by step is as good as riding in a carriage.
安步当车

surveillance是什么意思：
n. 监督，监视

We surveil the crosses by computers.
我们用微机监视各个十字路口。

My house now is surveilled by the police.
我的房子现在正受到警方的监视。

An electronic surveillance camera that saw the activity in the emBassy yard.
电子监测器监视大使馆院内的一举一动

Is final verification performed by/or under the surveillance of quality assurance?
最终检验是否按质量保证要求或在质保部门的监督下进行

The police kept the criminal under strict surveillance.
警察严密监视那个罪犯。