clarify duration example description (#21838)
clarify duration example description (#21838)


elevensky/ant-design,ant-design/ant-design,icaife/ant-design,zheeeng/ant-design,ant-design/ant-design,zheeeng/ant-design,icaife/ant-design,zheeeng/ant-design,zheeeng/ant-design,ant-design/ant-design,ant-design/ant-design,elevensky/ant-design,elevensky/ant-design,elevensky/ant-design,icaife/ant-design,icaife/ant-design