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- Genetic diversity within a breeding system of Pinus tabulaeformis. 油松育种系统遗传多样性研究。
- directed breeding system 定向育种系统
- Based on the results of emasculation,bagging and artificial pollination studies,Cistanche deserticola Ma takes selfing as the main breeding system. 结合去雄、套袋和人工授粉试验结果，认为肉苁蓉属于以自交为主的繁育系统。
- This kind of Fu lies Morpheus means not only oppress easily splanchnic, make breathe not free, opposite breed system also has certain effect. 这种俯卧位的睡眠方式不但容易压迫内脏、使呼吸不畅，对生殖系统也有一定影响。
- Omit condition of zoology, economy according to Qinghai, thoroughbred breed system includes blooded breed system, cross breed system 2 respects. 根据青海省生态、经济条件 ,良种繁育体系包括纯种繁育体系、杂交繁育体系 2个方面。
- The high level of genetic variation and clonal diversity found in E. songoricum are probably due to outcrossing or mixed-mating breeding system and multi-clone origin of populations. 本研究结果表明, 和其他荒漠植物相比, 准噶尔无叶豆表现出较高的遗传变异水平和克隆多样性, 这主要与该物种兼性生殖的繁育方式及多克隆起源有关;
- The cultural environment was improved via optimizing the structure of microalgae community by directive breeding microalgae. 可见，通过微藻的定向培育方法来优化虾池微藻群落结构，可改善养殖环境。
- Breeding System for High Grade Beef Production 高档牛肉生产所需的制种体系
- Review on breeding system of runner bean 多花菜豆繁育系统的研究进展
- Sex allocation theory provides a general explanation for diversity in breeding systems, in particular, it explains why most flowering plan ts are hermaphroditic. 文献中支持自交减少植物雄性投入的证据有很多，但是对繁殖分配与自交率的关系目前还没有系统的研究。
- Pollen-ovule ratio (P/O) of the angiosperms, the ratio of pollen grains to ovules, can reflect more indications than floral morphology for the breeding systems. 摘要花粉-胚珠比系指开花植物之花粉数与胚珠数的比值，对植物之繁殖系统较花之形态更具有指标作用。
- Conservation and Breeding System 体系
- She cast her eyes down to avoid direct eye contact. 她垂下双目以避免对视。
- I thought the law was directed against husbandmen. 我认为该法律是直接针对农民的。
- The complaints are directed at you. 这些牢骚是对你而发的。
- In this thesis, we discussed these species adaptive evolution through the geographical environment succession, main species morphological characters, breeding system and genetic diversity in the region. 本文从地理环境演变、主要物种的形态、繁育系统以及遗传多样性方面探讨西鄂尔多斯物种的适应性进化问题，研究结果如下：
- I'll book you on a direct flight to London. 我将为你预订直飞伦敦的航班。
- modern method of directive breeding 近代定向育种法
- He has chosen the most direct route. 他选取了最直的路线。
- APPLICATION OF COMPUTER ASSISTED BREEDING SYSTEM IN MODERN HOGPENS 现代化猪场计算机辅助育种系统的开发与应用研究
