介绍： lower one's guard 丧失警惕，疏忽大意，轻视而漫不经心

We should never lower our guard at any time.
任何时候我们都不应该掉以轻心。

It's not safe here, so you can never lower your guard.
这里不安全，所以千万别掉以轻心。

介绍： lower one's guard 丧失警惕，疏忽大意，轻视而漫不经心

We should never lower our guard at any time.
任何时候我们都不应该掉以轻心。

It's not safe here, so you can never lower your guard.
这里不安全，所以千万别掉以轻心。