If you must store your query results or pass them outside the method boundary, consider using an ordinary named struct or class instead of an anonymous type.

如果您必须在方法界限外储存或传递查询结果，请考虑使用一般的具名结构或类别，而不使用匿名型别。

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Using the contraction mapping principle, we proved a theorem about the existence of solution for initial value problem of a class of implicit ordinary differential equations of the first order.

本文应用压缩映象原理证明了一阶隐式微分方程解的存在唯一性定理。

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