1.有时打中而有时又打不中的;碰巧的
1.hit-or-miss
1.From the hit and miss nature of conception to all the dangers associated with pregnancy, it's often amazing that any babies are born at all.
从是否命中的概念看来，就怀孕的相关危险而言，婴儿诞生可说是个奇迹。
2.There was no planning to it. It was just hit and miss.
我并没有什么计划，只不过碰巧罢了。
3.Experiments have suggested that this approach is hit-and-miss , with some organisations more proactive than others.
实验表明，这种做法更像碰运气，总有某些机构比其他更主动一些。
4.The quality of inquests used to be hit and miss, with local lawyers and doctors serving as coroners.
过去的调查质量时好时坏，以当地律师和医生作为验尸官。
5.My weight-loss efforts these last couple of years have been hit-and-miss, as I've struggled to find something that works for me.
几年来，我减肥的努力总是毫无成果，我也曾费尽心力去寻找一种适合我的减肥方法。
6.I always say that body language is a bit hit and miss for deception detection.
我总说，靠肢体语言识别谎言有点碰运气，有可能会失误。
7.Market moves since the introduction of the Cobolli Gigli-Blanc-Secco triad have, after all, been rather hit and miss.
自从吉利--布兰克--赛科三人组进入市场以后市场形势发生了变化，毕竟有太多的胡乱的签约。
8.picking a remedy can be a bit hit-and-miss.
挑选治疗法可能会有点随意性。
9.Barnum understood that hit-and-miss advertising doesn't work, but a consistent message, told over and over, hits its mark .
巴纳姆了解乱枪打鸟式地打广告是没用的，可是持续发出始终如一的讯息就能正中标的。
10.George didn't know which house on the street was Jane's, so he began ringing doorbells hit and miss.
乔治不知道街上哪幢房子是珍妮的家，所以他挨家挨户地按门铃。