Tian
(
天
)
Tian
(
天
)
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Vocabulary
HSK 7–9 ②
Day 9
一成不变
New
一成不变
一成不变
一成不變
y
ì
ch
é
ng-b
ú
bi
à
n
unchanging, set in stone
idiom
Again
1
Hard
2
Good
3
Easy
4
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