The least companies can do is to keep a careful watch on the IT department-and, if you're going to sack somebody from that team, do so immediately.

公司最起码能做的是当心自己的IT部门——如果你要解雇某人，请尽快。

youdao

Whether or not the new iceberg is a harbinger of the greenhouse effect, it is clearly a hazard for ships plying the southern seas, and so satellites and planes will keep a careful watch on it.

不论这座新冰山是否是温室效应的先兆，但很明显，这座冰山对于往来于南方海域的船只是一大危险，因此卫星及飞机都密切观察它的行踪。

youdao

You keep a keen watch on your social media settings, are careful about what you share and only connect with those you know and trust.

FORBES: What Facebook Knows (And Not Just Facebook Either)