Returns block text from child template. See template inheritance.
返回子模版文本块。参见模板继承。
Child pages that use this template should inherit from the template page, which is shown in Listings 35 and 36.
应用这个模板的子页面应该继承模板页面，如清单35和36所示。
It does not need to be as complicated as the original, because your task template only USES plain text; you do not need to worry about substeps or child elements.
新模板不用像原来那样复杂，因为您的任务模板只使用纯文本，所以不需要担心子步骤或者子元素。
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