The StringHelper Category is a normal class - it doesn't need to extend a special parent class or implement a special interface.

StringHelper Category是一个普通类—它不需要扩展特定的父类或实现特殊的接口。

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For these levels, the respective tool is able to provide a list of changes at some granularity, whether that is file, package, class, or some finer category.

对于这些层次，个别的工具能够提供某种粒度上的一系列变更，不论是文件、包、类或某些更细粒度的类别。

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In addition, one class of family reasons shares a border with the following category, namely, having children in order to maintain or improve a marriage: to hold the husband or occupy the wife;

此外，有一类家庭原因与下列类别不无共通之处，这便是：生儿育女是为着维系或改善婚姻：能拴住丈夫或者使妻子不致于无所事事；

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