Certain useful types, like decimal and string, are built in.

某些有用的类型，如小数的和字符串类型，是内置的。

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This approach is particularly useful for certain types of projects.

此方法尤其适用于某些类型的项目。

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Adding punctuation inflectives, such as "Dash" for "-" or "AtSign" for "@" may prove useful when processing certain types of data, such as employee serial numbers or postal addresses.

事实证明，添加标点符号的变化在处理某些类数据（例如员工序号或邮政编码）时非常有用，例如为 “-” 添加 “破折号” 或为 “@” 添加 “AtSign”。

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