Definition
Used to express that a series of unfortunate events keeps happening.
一波未平，一波又起
I was late for work this morning, and then my car broke down. It's just bad luck, if it's not one thing, it's another.
我今天早上上班遲到了，然後我的車又壞了。真是倒霉，不是這件事，就是那件事。
She just recovered from a cold, and now she has a fever again. It's just, if it's not one thing, it's another.
她剛從感冒中恢復，現在又發燒了。真是，不是這件事，就是那件事。
I was hoping to relax this weekend, but first it rained, and then there was a power outage; if it's not one thing, it's another.
我本來希望這個週末可以放鬆一下，但先是下雨，然後又停電；不是這件事，就是那件事。