HSK 4
流行
liúxíng动
(of a contagious disease etc) to spread; to propagate; (of a style of clothing, song etc) popular; fashionable
这首歌最近非常流行。
Zhè shǒu gē zuì jìn fēi cháng liú xíng.
This song has been very popular recently.
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New in the HSK 3.0 word list at level 4.