版本信息如下表达，大版本号在小数点左边，小版本号在小数点后边，如(“1.0”)。
Version information will be expressed in major Numbers displayed left of the decimal point and minor version Numbers displayed to the right of the decimal point (e.g., "1.0").
之前描述的场景会引发一组非兼容性变更，所以需要更改Policy Check服务契约的大版本号，使其从1.0转变成2.0。
The previously described scenario results in a set of incompatible changes that requires that the major version number of the Policy Check service contract be incremented from 1.0 to 2.0.
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