HSK 7-9
空隙
kòngxì名
crack; gap between two objects; gap in time between two events
石板空隙里长出了小草。
Shí bǎn kòng xì lǐ zhǎng chū le xiǎo cǎo.
Grass grew out of gaps between the stone slabs.
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Appears across levels (7-9) in the HSK 3.0 word list.