Using a nested table, work items can be displayed in a tree structure, enabling work item levels to be distinguished based on the elements location.

使用固定表，可以将工作项目显示在一个树形结构之中，使得工作项目的层次可以根据元素的位置而有所区分。

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In other words, the Web browser can very easily change the appearance and structure of the tree using object properties like this.

换句话说，Web浏览器使用对象属性可以非常容易地更改树的外观和结构。

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Using photovoltaic cells, the Air Tree produces a substantial amount of energy, which is then sold back to the local electric companies, the profits being used for maintenance of the structure.

空气树通过光伏电池产生巨大的能量，这些电将输送回当地的电力公司，而由此产生的利润将用于该建筑的维护。

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