Hayley教口語，“碰運氣的”用英語怎么說？

adj. /?h?t.?n?m?s/

If something is hit-and-miss, you cannot depend on it to be of good quality, on time, accurate, etc.

沒準的，碰運氣的

The trains are often late, so getting to work on time is a fairly hit-and-miss affair.

火車經(jīng)常晚點，所以準時上班在很大程度上是件碰運氣的事。

I'm really sorry, my internet connection has been a bit hitand miss today.

對不起，我的互聯(lián)網(wǎng)連接今天有點時好時壞。