This creates a child element of with the tag name set to be "feet" and the value set to the value of the variable ft.
这样创建了子元素,其标记名称被设置为“feet”,并且将数值设置为变量ft的值。
This creates a child element of with the tag name set to be "feet" and the value set to the value of the variable ft.
这样创建了子元素,其标记名称被设置为“feet”,并且将数值设置为变量ft的值。
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