系统发育

Androgen: Any of a group of hormone s that mainly influence the development of the male reproductive system.

雄激素：一组主要影响雄性生殖系统生长发育的激素。

So far,the changes of barley anthers inphysiology and biochemistry during the mannitol pretreatmental period and theeffects of mannitol pretreatment on androgenesis and anther culture in barleyhave not been systematically studied.

到目前为止，还没有人系统地研究甘露醇预处理过程中大麦花药所发生的生理生化方面的变化，以及预处理后对大麦雄核发育和培养效果的影响。

The present work was de-signed to study systematically the changes of anther and pollen during themannitol pretreatment period on physiology and biochemistry;and then the ef-fects of mannnitol pretreatment on androgenesis and anther culture were stu-died.The donor plants used in this experiment grow in the field.

所以本文从以上几个问题出发，以大田生长的植株作为供试材料，首次系统地研究了甘露醇预处理过程中大麦花药花粉在生理生化方面所发生的变化；以及甘露醇预处理后对大麦雄核发育和培养效果的影响。

Aran anticline in the plane C4 sub-mermber can be divided into three compound fracture system.

在平面上Aran背斜C_4亚段可以分成3个复合的裂缝发育系统。

Besides, the underground construct of this area is also very complicated, and the rupture system in mid-shallow layer is developed owing to Dongying center apophysis.

同时，该区地下构造也非常复杂，中浅层受东营中央隆起带的影响，断裂系统非常发育。

The greenhouse ecosystem represents a unique environment for the development of arthropod populations.

温室生态系统代表着节肢动物生长发育的一类独特的生态环境。

Objective: To investigate the relationship between the renin-angiotensin system and steroidogenesis during the follicular development and atresia.

目的：研究在卵泡发育和闭锁过程中，卵巢的肾素-血管紧张素系统及其与甾体激素生成的相互作用。

The formation and development of embryo sac in the diploid and its autotetraploid of rice cultivar IR36 was examined using Laser Scanning Confocal Microscopy.

利用激光扫描共聚焦显微镜术对水稻品种IR36二倍体及其同源四倍体的胚囊形成和发育过程进行了系统的研究。

The journal dedicates to the studies in all aspects of the botany, mycology and phycology of the South Pacific, Australia, South America, southern Africa and Antarctica. Research areas include biosystematics and biogeography, ecology, physiology and biochemistry, genetics and reproductive biology, structure and development, ethnobotany, palaeobotany, bryology, lichenology and plant pathology etc.

该刊致力于南太平洋、澳大利亚、南美、南非以及南极洲的植物学、真菌学和藻类学各方面的研究，研究领域涉及生物系统学、生物地理学、生态学、生理学、生物化学、遗传学、生殖生物学、机构与发育、人类植物学、古植物学、苔藓学、地衣学以及植物病理学等等。

Porcine was acted as the experimental animal. It was researched on problem of the origin of obtaining early embryonic cells, methods of separating blastomere cells, best parameter and order of ECNT embryo electric activation and system of ECNT embryo IVC, which was to find a scientific method of fitting ECNT and a procedure of fitting the lab producing embryos largely, optimize the procedure of ECNT and improve the ECNT embryo in vitro.

本实验以猪为实验动物，对猪胚胎细胞核移植供体的来源、卵裂球细胞分离方法、核移植重建胚的电激活最佳参数、核移植受体的激活时序以及核移植重建胚体外培养系统相关问题进行了研究，旨在探索一种适用于猪胚胎细胞核移植的科学方法，提高猪胚胎细胞核移植胚胎的体外发育率，优化胚胎细胞核移植程序。

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。