The basic trait and step of the FTA and the fuzzy fault tree analysis are introduced, especially the basic theory of the qualitative analysis and the quantitative analysis.
介绍了故障树分析法和模糊故障树分析法的基本特点和步骤，重点介绍了故障树的定性分析和定量分析的基本原理。
Molecular genetic mapes can not only be used to identify qualitative traits, but also be utilized to discover quantitative trait genes.
应用分子遗传图谱不仅能鉴定质量性状，而且能发掘数量性状基因。
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