You know, you let your guard down.

我好不容易打开心房。

It's okay to let your guard down.

可以放下伪装了。

She's telling children do not let your guard down, always be careful, don't relax.

她告诉孩子们不要放松警惕，时刻小心，不要放松。

How hard it was for you to let your guard down to let me in.

让你放下防备让我走进你的内心是多么困难。

Sirenhead can appear almost anywhere dark, secluded, and depopulated, so you can never let your guard down when you’re in one of these areas.

海妖头几乎可以出现在任何黑暗、僻静和人烟稀少的地方，所以当你身处这些区域之一时， 你永远不能放松警惕。

Ms. Sanchez says, " don't let your guard down." The expression " to let your guard down" means to stop being careful or cautious for a period of time.

桑切斯女士说，“不要放松警惕。” “放松警惕”一词的意思是在一段时间内不再小心或谨慎。

There are predators out there who are looking to lure children away from their family and friends and to abduct them, so don't let your guard down.

外面有掠夺者，他们想引诱孩子远离他们的家人和朋友并绑架他们，所以不要放松警惕。