单词	Swiss ball
释义	Swiss ballˌSwiss ˈball noun [countable] trademark a large plastic ball that you sit on or lie against in order to do special exercises
随便看	diehard Dieppe diesel diesel fuel diet dietary dieter dietetics dietician Dietrich, Marlene Dieu et mon droit differ difference different differential differential calculus differential gear differentiate differentiation differently difficult difficulty diffidence diffident diffidently

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