safe 和security 什么区别呢?

safe和save有什么区别? social security card 和身份证有什么区别? food safety 和 food security 有什么区别 security和safety的区别 keep safety和keep safe有什么区别? homeland security 和 national security 有什么不同? stock security share有什么区别 bid bond和bid security的区别? security和safety的区别security和safety的区别是什么求解答 safety和security有什么不同 keep .safe和 keep.safelY 的区别 safe和safety的区别?急,