hair shirt
US /ˈher ˌʃɜrt/
UK /ˈher ˌʃɜrt/

1.
苦行衣, 毛衣
a shirt made of coarse animal hair, worn next to the skin as a penance or mortification of the flesh
:
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In medieval times, some ascetics wore a hair shirt to demonstrate their devotion.
在中世纪,一些苦行僧穿着苦行衣以示虔诚。
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The monk's severe penance included wearing a rough hair shirt.
这位僧侣的严酷苦行包括穿着一件粗糙的苦行衣。
2.
折磨, 自我惩罚
something that causes constant discomfort or annoyance, especially as a self-imposed burden
:
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His constant worrying about trivial matters was a real hair shirt for him.
他对琐事的持续担忧对他来说是一种真正的折磨。
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Living with such strict self-imposed rules became a kind of hair shirt.
生活在如此严格的自我约束下,变成了一种折磨。