严格的法律现已生效以打击网络犯罪。

Strict laws are now ___in ___place to combat cybercrime.

由于疫情，旅行限制已经实施了数月。

Travel restrictions have been ___in ___place for months due to the pandemic.

一个全面的监控系统已经到位以确保质量控制。

A comprehensive monitoring system is ___in ___place to ensure quality control.