If a client can call a method or access a field, test it.

如果客户机能够调用方法或访问字段，那么就测试它。

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These fall into three categories: method call transformations, field access transformations, and a new object transformation.

转换类型可分为三类：方法调用转换、字段访问转换和新对象转换。

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Back in Part 2, I showed how reflection is many times slower than direct code for both field access and method calls.

在第2部分，我展示了无论是对于字段访问还是方法调用，反射都比直接代码慢很多倍。

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