1. 空降：controlling potentiometer 控制电位差计 | nose dive 空降 | promotion worker 推销员

2. 暴泻：normal value正常价值 | nose dive暴泻 | not negotiable不可转让

3. 垂直降落：nose-count 人口调查 | nose-dive 垂直降落 | nose-thumbing 轻蔑动作

4. 急剧下降,或一落千丈：To bail out 指跳伞,或解救困难 | Nose dive 急剧下降,或一落千丈 | Up in arms 指起来进行武装斗争,或者非常愤怒,准备打架

noun

1. a steep nose-down descent by an aircraft

    Synonym: divenosedive