self hem

n (usu sing 通常作单数) 1 cutting edge of the blade of a knife 刀刃. 2 (idm 习语) on a knife-edge (a) (of a person) nervous (about the outcome of sth) （指人）（对某事物的结果）十分焦虑: He's on a knife-edge about his exam results. 他对考试成绩十分担心. (b) (of a situation, etc) at a critical point （指情况等）处於紧要关头: The success of the project is still very much on a knife-edge. 这一项目的成败目前仍处於关键时刻.

seismologist, seismology, seismometer, seize, seize hold of, seize sb. by the, seizure, seldom, select, select committee, selection, selection committee, selective, selective service, selectively, selectivity, selector, selenium, selenium cell, self, self-, self-abnegation, self-absorbed, self-absorption, self-abuse, self-addressed, self-appointed, self-assembly, self-assertion, self-assertive, self-assurance, self-assured, self-catering, self-centered, self-centred (US -centered), self-centredness (US self-centeredness), self-confessed, self-confidence, self-confident, self-conscious,