UPGMA is taken to calculate the genetic distance within and between populations. Systematic tree is constructed.

应用UPGMA法计算了种群内和种群间的遗传距离，并构建了系统树。

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Afforestation countermeasures for mountain waste in Saihanba Tree Farm is discussed using systematic engineering.

运用系统工程分析的观点对塞罕坝林场今后的荒山造林对策进行了探讨。

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Tree of decision is a kind of analyzing tool used to solve the problems of risk's decision. In detail, it is a systematic method using tree derivation to analyze and select action scheme.

决策树是用来解决风险型决策问题时使用的一种分析工具，具体是用树形图来分析和选择行动方案的一种系统分析方法。

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To be systematic, I'm going to build this tree depth-first left-first.

为了保持系统性，我将要把这棵树设置,为深度优先和左边优先。

麻省理工公开课 - 计算机科学及编程导论课程节选