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二次曲线

二次曲线 èr cì qū xiàn quadratic curve (geometry) / conic
二 èr two / 2 / (Beijing dialect) stupid
二次 èr cì second (i.e. number two) / second time / twice / (math.) quadratic (of degree two)
 次 cì next in sequence / second / the second (day, time etc) / secondary / vice- / sub- / infra- / inferior quality / substandard / order / sequence / hypo- (chemistry) / classifier for enumerated events: time
  曲 Qū surname Qu
  曲 qū bent / crooked / wrong
  曲 qǔ tune / song / CL:支
  曲 qū variant of 曲
  曲 qū fermentation starter; leaven (molds, yeasts or bacteria used in fermenting soy products or brewing etc) / Taiwan pr. [qu2]
  曲线 qū xiàn curve / curved line / indirect / in a roundabout way
   线 xiàn variant of 线
   线 xiàn thread / string / wire / line / CL:条,股,根 / (after a number) tier (unofficial ranking of a Chinese city)
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By MDBG 2026