在第三纪，重寄生属植物的祖先偶然寄生在桑寄生科某些植物上，经过几千万年的协同进化，形成了今天比较稳定的寄生与寄主关系。
Their ancestors were parasitic on ancestors of some plants of Loranthaceae by chance during Tertiary. It took them millions of years to form a sturdy relationship between parasites and hosts.
通过使用配置板或者CTRL +t键，来简单地创建一个DB 28系统单元，通过将FURNINST单元拖拉到新创建的DB 2 8系统单元上，来创建寄主关系。
Simply create a DB2 8 System unit by using the palette or CTRL + t and create the host relationship by dragging the FURNINST unit onto the newly created DB2 8 System unit.
因此，自然选择让这种寄主-寄生关系变得稳定。
Thus, natural selection stabilized this host-parasite relationship.
上述捕虏体均与寄主玄武岩无成因关系。
No original relation was found between the xenoliths and the host basalt.
这类熔体参与变质反应不仅受控于温压条件，而且与寄主岩石脱水熔融、长英质矿物部分熔融存在密切成因关系。
These reactions involving melt are not only controlled by PT conditions, but also genetically associated with dehydration melting, partial melting of felsic minerals in host rocks.
寄主植物无机盐含量与紫胶蚧胶被厚、死亡率、怀卵量、个体泌胶量有一定关系，但不是很紧密。
There were some relationships between mineral salt contents of hosted branches and the thickness of raw lac, mortality, fecundity and secretion amount of K. lacca but not significant.
尤其是微卫星引物pcr扩增明确了桃蚜寄主生物型和体色生物型的遗传分化关系。
Particularly the method of microsatellite primer-PCR amplification makes clear the relationship of genetic diversity.
在病害三角关系中，病原物的致病性及寄主的抗病性是决定病害发生与否的内在因素。
Pathogen pathogenicity and host resistance are internal factors in deciding plant diseases. Wheat leaf rust is a kind of worldwide disease.
通过对寄主和病毒原主及其共生关系的仔细研究，我们对病毒侵染寄主的运动有了一些初步了解。
We have some knowledge of the infection. through the carefully research of host, virus original host and the sym - biosis relationship.
本文综述了寄主植物次生物质与叶甲取食行为关系的研究进展。
This article reviews the studies on interactions of plant secondary substances and feeding behavior of leaf beetles.
来源于相同（或相近）地区的菌株相关系数可达极显著水平，而从相同寄主角度分析，得到菌株间的相关系数有高有低，多表现为相关不显著。
The correlation of different strains from the same or close area had a significant difference, but that from different hosts did not have it.
研究结果还提示松干锈菌的遗传分化主要同寄主有关，而与地理分布关系不大。
Evidences were also obtained that host adaptation, rather than geographic factors, is the primary force to drive genetic differentiation of the pine stem rust fungi.
综述了寄主植物、小蠹、天敌三重营养关系的化学生态学研究。
This paper summarizes the recent progress in the study on chemical ecology of tritrophic interactions among host-plants, bark beetles and natural enemies.
研究了白蜡虫营养需求与寄主植物营养含量关系。
Research advances of nutrient requirement and metabolism of black porgy;
研究了白蜡虫营养需求与寄主植物营养含量关系。
Research advances of nutrient requirement and metabolism of black porgy;
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