HSK 7-9
曲线
qūxiàn名
curve; curved line; indirect; in a roundabout way
图中的曲线逐渐上升。
Tú zhōng de qūxiàn zhújiàn shàngshēng.
The curve in the chart rises gradually.
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Appears across levels (7-9) in the HSK 3.0 word list.