英语语法分析

Surveillances at international airport have been increasing.

在国际机场的检查有了增加。

What kinds of inspections and surveillances you're required to perform.

哪种的检查和监督，你们需要执行。

In the effective period, four surveillances should be conducted in every year, and recertification should be conducted when expiration.

在两年有效期内每年进行不低于四次监督审核，两年到期进行再认证审核。