in operation

操作中, 运转中, 生效, 实施中

例句与用法：

Ensure that the grille is in place while the machinery is in operation.

机器运转时一定要放好安全网罩。

Is this rule in operation yet?

这一条例生效了吗?

详细释义：

ph.

(法律规章或计划)实施中, 有效