slice 作动词的意义有： 1.make a clean cut through; "slit her throat" 2.hit a ball and put a spin on it so that it travels in a different direction 3.cut into slices; "Slice the salami,please" 4.hit a ball so that it causes a backspin strike 看第一个例句,所以句子翻译为：她用开信刀划破了自己的手.
