HSK 7-9
亩
mǔ量
classifier for fields; unit of area equal to one fifteenth of a hectare
这片果园占地二十亩。
Zhèpiàn guǒyuán zhàndì èrshímǔ.
This orchard covers twenty mu.
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Appears across levels (7-9) in the HSK 3.0 word list.