系统发育

On the evolution of secondary xylum and its significance in plant phylogeny.

次生木质部的进化与植物系统发育的关系。

Molecular marker is the key point to the reconstruction of phylogeny.

分子标志是重建生物系统发育关系的关键。

At present, the only way to clarifying evolutionary history of species is phylogeny.

系统发育研究已是澄清所有进化历史问题的必由之路。

Our findings may provide insights into the phylogeny of kininogen genes as well as other gene families in vertebrates.

本文的发现为揭示激肽原以及其它基因家族在脊椎动物中的系统发育史提供了有益的启示。

Studies on molecular phylogeny on Minaceae have not been reported until now.

而该科的分子系统发育研究还未见报道。

In order to understand their ecological adaptation process thereby to reveal their phylogeny and to solve problems may be facing in resources development process, the evolutionary ecology of Sinopodophyllum hexandrum and its close related species Dysosma veitchii, Diphylleia sinensis, Dysosma versipellis and Podophyllum peltatum has been studied in this thesis.

为洞悉该类植物的生态适应过程进而为分析它们的系统发育并解决资源开发过程中遇到的一些生物学问题，本论文以繁殖生态学为核心，对桃儿七及其近缘种川八角莲、八角莲、南方山荷叶及足叶草进行了进化生态学研究。

The existence of nuclei in mature xylem cells is a symbol of primitiveness, for such nuclei all exist in secondary xylem of families or genera which are in the rather primitive stage of development in plant systems.

成熟木材细胞中的细胞核是一个原始的特征，均出现在植物系统发育上较为原始的科属木材中。

Although Pulsatilla can easily be distinguished from Anemone by the former having a long, plumose beak on the achenes formed by the persistent style, phylogenetic studies have shown that they are probably congeneric.

尽管Pulsatilla 能容易地通过其在瘦果上有宿存花柱形成的长的、羽状喙，与银莲花属区分，系统发育的研究显示它们可能是同属。

The transitions at the third codon positions of the COI data set were found saturated, but they were retained for analysis, because they contain the majority of the phylogenetic information.

虽然 COI 基因数据中第3位点的转换替换已达饱和，但由于这些位点含有大量系统发育信息，因而在数据统计分析时并没有将这些位点删除。

Inferring an accurate evolutionary tree of life requires high-quality alignments of molecular sequence data sets from large numbers of species.

推断生命的一个准确的系统发育树需要来自大量物种的分子序列数据集的高质量的比对。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。