单词	knife-edge
释义	knife-edge noun ˈnīf-ˌej  1 : a sharp wedge of steel or other hard material used as a fulcrum for a lever beam in a precision instrument 2 : a sharp narrow knifelike edge Word History First Known Use 1818, in the meaning defined at sense 1
随便看	nutritive nutritive plasma nutritive polyp nutritive ratio nutritively nutritiveness nutritivenesses nutritives nutritory nuts nuts (about) nuts about nuts and bolts nuts-and-bolts nutsch nutsch filter nutsedge nutsedges nutshell nutshells nutsier nutsiest nutso nutsos nutsy

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