A service operation can have any number of inputs and outputs with types of messages or primitive types.

服务操作能够拥有任何数量的消息或者简单类型的输入和输出。

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It also gives the total number of instances of that particular type, which allows for some primitive calculations and guesses about relative cost per instance.

它同样给出了特定类型的总示例数量，支持部分原始计算，并猜测每个实例的相对成本。

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The XML Schema specification defines a number of primitive types, such as string, Boolean, and double, that a processor understands and provides an implementation for.

XML模式规范定义了许多原始类型，比如string、boolean和double，处理器可以理解这些类型并为其提供一个实现。

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Count the number of primitive operations in each step.

数一数每一步中的基本操作,好的，如果我们看看这段代码。

麻省理工公开课 - 计算机科学及编程导论课程节选

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