HSK 7-9
不力
búlì形
not to do one's best; not to exert oneself
管理不力造成资源浪费。
Guǎn lǐ bú lì zào chéng zī yuán làng fèi.
Poor management caused a waste of resources.
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Appears across levels (7-9) in the HSK 3.0 word list.