以四分树为数据结构，建立了网格细分法生成自适应网格算法。

The generation algorithm of adaptive mesh which is based on the quad-tree data structure is presented.

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几乎每隔一分钟，我就会听见又有一棵树倒下时发出的折断声、噼啪声和塌倒声。

Every minute or so I could hear a snap, a crack and a crash as another tree went down.

《柯林斯英汉双解大词典》

这啁啾声来自一丛茂密的冬青树，它结满了鲜红的浆果，十分明亮，玛丽以为她知道是谁的了。

The chirp came from a thick holly bush, bright with scarlet berries, and Mary thought she knew whose it was.

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