不幸的事
infelicity
sad thing
unfortunate thing
人世间有很多不幸的事。
There is so much infelicity in the world
在此期间她遭遇了很多不幸的事。
It was a time in which many sad things happened to her.
好朋友之间吵架是很不幸的事。
A quarrel between good friends is a very unfortunate thing
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