若要测试位元栏位，判断特定列举值是否存在，请使用布林逻辑运算子。

To test a bit field to determine whether a specific enumeration value is present, use the Boolean logical operators.

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对于储存可组合列举的栏位而言，个别的列举值会被视为栏位中的位元群组。

For fields that store combinable enumerations, the individual enumeration values are treated as groups of bits in the field.

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若要使用位元栏位正确储存和撷取结合的列举值，列举中所定义的每个值都必须为二的次方。

For a bit field to store and retrieve combined enumeration values correctly, each value that is defined in the enumeration must be a power of two.

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