1、Farming can be very much a hit-and-miss affair.
務農可能是件很要碰運氣的事。

2、As you might expect, produce is also the most hit-and-miss category, quality-wise.
就像你預想的那樣，農產品同樣也是最容易胡亂擺放的類別。

3、Getting a response online can be a hit-and-miss affair.
在網上得到回應可以算是瞎貓碰死耗子的事件。

hit-and-miss翻譯