HSK 7-9
单薄
dānbó形
weak; frail; thin; flimsy
他只穿单薄外衣站在风中。
Tā zhǐ chuān dān bó wài yī zhàn zài fēng zhōng.
He stood in the wind wearing only a thin coat.
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Appears across levels (7-9) in the HSK 3.0 word list.