That most exact and convincing of all sciences, mathematics, is sheerly metaphysical.

科学中最谨严而令人信服的一门, 数学, 就是纯粹形而上学的.

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Thirdly, some clinics impose on patients unnecessary treatment or examination sheerly for profit.

第三, 一些诊所为了牟利而强加给病人各种不必要的检查和治疗.

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