HSK 7-9
接二连三
jiē’èr-liánsān(idiom) one after another; in quick succession
最近好消息接二连三传来。
Zuì jìn hǎo xiāo xi jiē èr lián sān chuán lái.
Good news has arrived one after another lately.
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Appears across levels (7-9) in the HSK 3.0 word list.