watch over

看守；监视英释中释(formal) to take care of sb/sth; to guard and protect sb/sth

1 Imagine that we have been appointed Guardian of the Gate, and our job is to keep vigilant watch over who passes through..设想下我们做了时空之门的守门人，我们的工作就是保持警惕，看守那些穿过门的人。

2 Some just prefer to sleep outside, to keep watch over their property, or to get out from the stifling heat indoors..还有的只是喜欢睡在室外，方便看守他们的财产，或者是为了远离室内的闷热。