knife edge 刀口 ; 刀棱 ; 插刀式砌口 ; 刀锋
knife-edge follower 尖底从动件 ; 从动件
knife-edge bearing [机] 刃形支承 ; 刃支承 ; [机] 刀口承 ; 刀口支承
offset knife-edge follower 偏置尖底从动件
Steel Knife-Edge 钢质刀口
Foucault knife-edge test 傅科刀口检验 ; 傅科刀口检验法
knife-edge relay 刀形继电器 ; 刃式继电器
knife-edge pointer 刀缘指针 ; 刀子曲率半径
knife edge curvature radius 刀子曲率半径
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"he lived on a knife-edge between genius and insanity"
以上来源于: WordNet
PHRASE To be on a knife-edge means to be in a situation in which nobody knows what is going to happen next, or in which one thing is just as likely to happen as another. 形势难料; 扑朔迷离 [oft v-link PHR]
The game is poised on a knife-edge. One mistake or one piece of good luck could decide it.
比赛形势扑朔迷离。一个失误或是一点运气就有可能决定胜负。
ADJ You can use knife-edge to refer to something that is very exciting or tense because you do not know what is going to happen next. 难以预料的 [ADJ n]
Tonight's knife-edge vote could be uncomfortably close.
今晚的投票难以预料，结果可能会很接近，真令人紧张。
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