knee [英] [ni:] [美] [ni] [名] 膝盖;膝部 词频排名 3732/55435 学习人数 43734 难度等级 1/10 认知比例 81.54% 例句 His left knee was hurt in an accident. 他的左膝在一次事故中受伤了。 The water was knee - deep. 水深及膝。 On your knees now. 跪下 助记 联想 “你”:你!跪下(kneel)! on your knees ! 跪下! keen adj渴望的 热心的