例如，全球和区域气候变化和自然变异可以影响天气，他说。
For instance, global and regional climate change and natural variability can influence weather, he said.
采用传统的自然变异繁殖方法育种周期长，效果又不明显。
Natural variation is one of the traditional reproduce methods, not only its breeding cycle is too long, but also produces little effect.
他们表示，自然界里有着太多的自然变异使其直接联系不易被察觉。
There is more than enough natural variability in nature to mask a direct connection, they say.
但通常的自然变异原因似乎解释不了目前的趋势，所以，科学家倾向于认为这是人为的。
But the usual causes of natural variability do not seem to explain the current trend, so scientists incline to the view that it is man-made.
气候变化是长期的，我们不能用一种天气情况来判断说有大的气候自然变异。
Climate change is all about long term trends, which are hard to detect in a weather record which has very large natural variability.
森林灾害是指在自然变异和人为影响对生物圈及人类社会产生危害性后果的事件。
The forest disaster mentioned here refers to the hazardous effect on biosphere and human society caused by nature and humans destroy.
方法对91例乙型肝炎患者采用基因芯片技术，检测HBV6位点的自然变异。
Methods 6 sites mutations of HBV in 91 patients were detected by gene chip technique.
本研究将GS 3蛋白质的结构域的功能与水稻种子籽粒大小的自然变异联系了起来。
This study linked the functional domains of the GS3 protein to natural variation of grain size in rice.
油占8号是广西农科院水稻所从“澳粳占”自然变异植株中选育而成的优质常规稻新品种。
Youzhan 8, selected from a natural mutation of variety Aojinzhan by Rice Research Institute of GXAAS, is a fine grain quality inbred variety of indica type.
粒重是作物产量的重要构成因素之一，由来源于自然变异的数量性状基因座(QTL)控制。
Grain weight is one of the most important components of grain yield and is controlled by quantitative trait loci (QTLs) derived from natural variations in crops.
因此，发掘小麦品种中LCT1自然变异，对于通过常规育种或基因工程提高小麦耐盐性具有重要意义。
Thereafter, Mining LCT1 natural diversity in wheat is important to improve salt-tolerance by traditional breeding and genetics engineering.
在模式生物中的自然变异的遗传学研究提供了一个在基因功能分子分析和对适应性及自然选择的进化研究的桥梁。
Genomic studies of natural variation in model organisms provide a bridge between molecular analyses of gene function and evolutionary investigations of adaptation and natural selection.
1984年从人工病圃中选择自然变异株，经过多年连续定向筛选，于1993年育成特早熟抗病棉花新品种辽棉15号。
In 1984, natural variation plants were selected from man-made disease garden. Through directional screening the early-maturing and disease-resistant new variety-Laomian 15 came into the world in 1993.
如生活方式、自然力量、减少基因变异的行为；还有一些促进这个进程的行为。
Some lifestyles, and some forces of nature, act to reduce genetic variation; others act to promote it.
但人类能够全面并且快速适应新环境，这个新发现的证据说明自然选择要想改变某一特征可能不必等待正确的变异发生，而是还有其它选择。
But the new evidence that humans have adapted rapidly and extensively suggests that natural selection must have other options for changing a trait besides waiting for the right mutation to show up.
可能只是地球岩石圈(岩石圈是地球外部的固体部分)中应力场的自然的暂时变异。
Could simply be the natural temporal variation of the stress field in the earth's lithosphere.
事实上，大部分中立变异都会被自然选择除灭，只有小部分在群体中传播并因此固定下来。
In fact, while the vast majority of neutral mutations die out, a few spread throughout a population and thus become \ \ \ \ \ \ \ "fixed \ \ \ \ \ \ \".
农业专家们也表示，这样罕见的情况实则是大自然的一种变异，如果母鸡在生蛋时受到惊吓，就可能产下异常的鸡蛋。
Experts say the rare phenomenon is just a quirk of nature and can occur if the chicken receives a shock during egg production.
拟态是无数代自然选择和遗传变异的进化而获得的有利特征的结果。
Mimicry arises as the result of evolution through natural selection and the occurrence of random genetic mutations that lead over many generations to the appearance of favorable characteristics.
遗传算法模仿达尔文的自然选择，其中“适应性”选择进行生存、繁殖以及由此而来的适应性变异的个体。
Genetic algorithms mimic Darwinian natural selection, where "fitness" selects individuals for survival, breeding, and, hence, adaptive mutation.
这样长出来的肢体没有实际作用，但它能够证实，基因变异能产生复杂的结构，自然选择能够测试这些结构的可能用途。
These abnormal limbsare not functional, but their existence demonstrates that geneticmistakes can produce complex structures, which natural selection canthen test for possible uses.
刊登在《自然》杂志上的这项研究特别标出了一个常见的基因变异。如果能将其修复，孤独症病例可能会减少15%。
The Nature study highlighted one common genetic variant which, if corrected would cut cases of autism by 15%.
Scitable—免费的自然科学图书馆和个人学习工具，目前专注于遗传学、进化论、变异学以及生物复杂性等领域。
A free science library and personal learning tool that currently concentrates on genetics, the study of evolution, variation, and the rich complexity of living organisms.
人类的大多数变异基因都是中性的，这意味着变异之所以被激发不是出于自然选择，而是由于产生了良性变异或染色体在复制时候发生了混乱。
Most variation in the human genome is neutral, meaning that it arose not by natural selection but by processes like harmless mutations and the random shuffling of the genome between generations.
为了使自然选择得以进行，不同的变异对于各类人种大概都是适用的。
Presumably, different mutations were available in each population for natural selection to work on.
但在自然界大多数种群中，很难判断遗传是否源于DNA序列改变或者表观基因变异。
But it's hard to tell in most natural populations whether inheritance is due to DNA sequence variation or epigenetic changes.
奈特说，“大气环流自然发生变异。”
"Variations in atmospheric circulation happen spontaneously," says Knight.
奈特说，“大气环流自然发生变异。”
"Variations in atmospheric circulation happen spontaneously," says Knight.
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