knife英 [na?f] 美 [na?f] n.刀;匕首;刃部;手術(shù)刀vt.切割，刺;傷害vi.劈開;劃過雙語例句：Two robbers broke into her home, held a knife to her throat and stole her savings.兩個盜賊闖進(jìn)了她的家，把刀架在她的脖子上，搶走了她的積蓄。