Put sharp knives out of the reach of children.把锋利的刀子放在儿童够不到的地方。

Two robbers broke into her home, held a knife to her throat and stole her savings.两个盗贼闯进她家中, 把刀架在她脖子上, 抢走了她的积蓄。

Kelly was about to go under the knife when her surgeon stopped everything.凯莉手术正要开始时被外科医生叫停了。