现在看起来这些以甲烷为基础的食物链和纯粹的无脊椎动物相比，更可能会延长生命树，可能这种情形已经持续了数百万年。
It now seems, though, that such methane-based food chains may stretch farther up the tree of life than mere invertebrates-and may have done so for millions of years.
通过对原有决策树学习算法的研究，提出了以分类准确度为基础的属性选择算法；
We bring forward the newly attribute chosen algorithm based on classified certain degree of condition attributes for decision attribute.
该文以丛生树模型为基础，提出了一种片段式查询执行计划。
In this paper, we offer a segmented query executive plan which is based on bushy tree model.
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