Traveler's should always be aware: no security system is ever going to be foolproof and 100% secure.

旅行者们得时刻注意：没有任何的安全机制能被证明100%安全。

youdao

It has to be foolproof when he comes home.

他回家的时候，一定要绝对保险。

youdao

It has to be foolproof when he comes home.

他回家的时候，一定要绝对保险。

youdao