Tian
(
天
)
Tian
(
天
)
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Vocabulary
HSK 7–9 ③
Day 20
夜以继日
New
夜以继日
夜以继日
夜以繼日
y
è
y
ǐ
j
ì
r
ì
day and night, around the clock
idiom
Again
1
Hard
2
Good
3
Easy
4
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