Your implementation may write its contents, including child elements.
您的实作可以撰写其内容，包括子项目。
The plants child element contains many plant child elements, each of which contains further information about that plant, including the name, description, quantity and price.
plants子元素又包含很多plant子元素，每个plant子元素包含关于该花卉的补充信息，比如说名称、描述、数量和价格。
Gets a value that indicates whether keyboard focus is anywhere inside the element bounds, including if keyboard focus is inside the bounds of any visual child elements.
获取一个值，该值指示键盘焦点是否在元素边界内的任何地方，包括键盘焦点是否在任何可见子元素的边界内。
Gets a value that indicates whether keyboard focus is anywhere inside the element bounds, including if keyboard focus is inside the bounds of any visual child elements.
获取一个值，该值指示键盘焦点是否在元素边界内的任何地方，包括键盘焦点是否在任何可见子元素的边界内。
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