HSK 7-9
密布
mìbù动
to cover densely
山坡上密布着大大小小的石洞。
Shānpō shàng mìbù zhe dàdàxiǎoxiǎo de shídòng.
The hillside is densely covered with caves of many sizes.
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Appears across levels (7-9) in the HSK 3.0 word list.