hit and miss

基本解释

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。
That hit and miss pattern has repeated itself often in the four months the leak has continued, and we’ve put together this FAQ to explain why we don’t post new oil slick images every day.
自原油泄漏开始的四个月来，像那样碰运气的模式反复出现，于是我们归纳整理了这些常见问题，来解释为什么我们不是每天都上传浮油的最新图像。
It is simpleminded, features a lot of hit and miss comic relief, has a romance that lacks spark, and it hits a second act roadblock like many action films do… and yet why is it still exciting?
电影走典型的无脑型情节路线，间歇性的插科打诨，缺少火花的浪漫爱情，还有其它动作电影一样会遇到的问题，动作设计上的瓶颈，但为什么大家仍然兴奋不已呢？

So it's this interesting scenario where it's probably hit or miss, certainly early on and as one of the clips they are indicated, these are the kinds of things where computers ideally have to learn overtime.
因此，这是一个有意思的事情,因为它有可能是投其所好或者不对其胃口，当然继续,正如其中一个短片所示，这些东西需要计算机,花一些时间去学习。
哈佛公开课 - 计算机科学课程节选

Mr. TOM MATANO (Academy of Art University): It's almost hit and miss, in a way.
NPR: Auto Watchers Underwhelmed by U.S. Designs
Striking an enemy target was then a hit and miss affair, as indeed it still is, despite claims to the contrary.
ECONOMIST: Thomas Ferebee The