产生变异

The sterile pollens were very concerned with non-equality of homologouschromosomes at two polars,and the difference of pollen yields among individuals werelikely related with disintegration of Tapetum in Prophase I.

其中败育花粉的产生与同源染色体的不均衡分配关系最为密切，而花粉产量的差异则可能是在减数分裂前期I时即发生绒毡层解体而造成的，其根源仍在于毛白杨染色体的异源性，此外易位、倒位等染色体结构变异和天然三倍体的存在也常常会加剧人们对毛白杨配子败育严重的印象。

Results: The mutation of the new alleles of 2 pedigrees was increasing and decreasing a single repeat.

结果：2个家系中子代新产生的等位基因变异表现为一个重复单位的增加或减少。

Thanks to the western Pacific subtropical high, connecting the mid-latitude with the low-latitude circulation; meanwhile, its location and intensity obviously impact on the rain belt, storm rainfall, dryness-wetness, and typhoon track of China, studying the evolution law of the western Pacific subtropical high, has very important theoretic and realistic significance.

由于副热带高压中的西太平洋副热带高压是连接东亚地区中低纬环流系统的纽带，且其位置、强度如何直接对我国的雨带、暴雨、早涝以及台风路径等产生十分重要的影响，因此对副热带高压，尤其是西太平洋副热带高压变异规律的研究具有十分重要的理论意义和现实意义。

These deficiencies result from the facts(1)that the subjectivity of policyimplementers can vary policy information in constructive and distorting cognition;(2)that policyimplementing subjects are not well-learned;and(3)that the referents of linguistic symbols withpolicy information are not definite.

产生这些认知缺陷的原因主要在于：1、政策认知的主体性特征会通过建构性认知和扭曲性认知致使政策信息在认知过程中发生变异；2、政策执行主体的知识素质偏低；3、承载政策信息的语言符号指代关系具有不确定性。

Based on product platform, many design candidates were produced by making use of inheritance, mutation, as well as crossover of evolution technology.

在产品平台的基础上，利用进化技术中的遗传、变异和交叉等方法进行产品设计，产生更多的变型产品设计方案。

Internal variations of the climate system, e.g., changes in the abundance of greenhouse gases, also may produce fluctuations of sufficient magnitude and variability to explain observed climate change through the feedback processes interrelating the components of the climate system.

内在气候系统的改变，如温室气体的浓度变化，也会产生足够强度和变异的波动，用以解释所观察的回鐀过程与气候构成要件间相互作用所造成的气候变迁。

In contrast, asexual reproduction does not generate genetic variation but can be seen as an adaptation to predictable environmental conditions.

相反，无性生殖不产生遗传变异，但可以视为是对可预测环境条件的适应。

In contrast, asexual reproduction does not generate

相反，无性生殖不产生遗传变异，但可以视为是对可预测环境条件的适应。

A variant was made by dealers in New Zealand for motorsport which had larger valves, two twin 40DHLA carburettors, modified camshafts and a higher compression ratio to produce around 125 bhp.

阿变异了对赛车运动在新西兰的交易商拥有更大的阀门，两张40DHLA化油器，修改凸轮轴和更高的压缩比产生大约125匹马力。

As we try to keep up with these varying references, inhibitions build upon themselves and multiply.

当我们尝试要跟上这些变异的参考点时，这些禁忌就互相堆叠而加倍产生。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。