降低警惕心 英文怎么说

"降低警惕心" 英文可以译为 "lower one's guard" 或 "let down one's guard."

来源：

这个短语来源于战争术语，指在战斗中不保持警惕或不注意周围的情况，从而使自己容易受到伤害或被击败。在日常生活中，人们也会用这个短语来指在与他人交往中不保持警惕，从而使自己容易受到伤害或欺骗。

英文例句及其中文翻译：

"I let my guard down around him, and he took advantage of me." (我对他放松了警惕，他就占了我的便宜。)
"She lowered her guard and confided in him, but he betrayed her trust." (她放松了警惕，向他倾诉了她的心事，但他却背叛了她的信任。)
"He's always so charming that it's easy to lower your guard around him." (他总是那么迷人，所以很容易对他放松警惕。)
"I shouldn't have let my guard down, now I'm paying the price for my mistake." (我不应该放松警惕，现在我正在为自己的错误付出代价。)