As to higher voltage rating polymer cables, electrical tree aging problem is more outstanding.

随着电网电压等级的提高，电缆的电树枝老化问题愈显突出。

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This paper introduces water tree aging theory of XLPE cables and insulated characteristic of water tree aged XLPE cables. Temperature of XLPE cable joint and relation with water tree are analyzed.

本文介绍了交联聚乙烯电力电缆的水树老化机理及含水树电缆的绝缘特性，并分析了交联聚乙烯电缆连接头中温度指标重要性及其与水树的关系。

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Years such as the fingers over the water, like, before I knew it, we have grown up, while the tree is gradually aging, and even the new leaves are no longer the hair full of vitality.

岁月如指间的流水一样滑过，不觉间我们已长大，而树却渐渐老去，甚至新发的树叶都不再充满生机。

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The loss of youthful beauty the thickening of necks, the rounding of bellies, the wrinkles is upsetting, but the added weight has a kind of reassuring fullness, like moss growing on the trunk of an aging tree.

NEWYORKER: Stiff Upper Lips