宁在空旷地而不是树冠下自然繁殖。
Reproduce naturally in the open rather than under an overstory.
你们知道家养火鸡是不能自然繁殖的吗？
Did you know that the domestic Turkey is unable to procreate naturally?
首先，它是违背自然的，最好是自然繁殖。
First, it is against naturally, the best way is nature reproduction.
这些利于野核桃的自然繁殖与更新和保持生态平衡。
These are advantageous to the natural propagation and rejuvenation of wild walnut, and favourable to keeping ecological balance.
金鱼的繁殖，可分为两种繁殖方式，自然繁殖与人工繁殖。
Goldfish breeding reproduction can be divided into two kinds natural reproduction and artificial propagation.
一种称作“生物注气法”的技术依靠向地下泵氧，促使微生物自然繁殖以分解泄漏的石油。
A technique called "biosparging" relies on pumping oxygen underground to help naturally occurring microorganisms multiply and consume oil spills.
不过问题是它们没法自然繁殖，于是有心人就截取了部分枝条嫁接到其他橙树上，希望生产出更多美味水果。
Since the new tree was unable to reproduce naturally, caretakers amputated some of its limbs and grafted them onto other citrus trees to produce more of the desirable fruit.
大熊猫自然繁殖的比率很低限制了种群的快速恢复，来自非法猎取，产地损失，还有其他人为因素影响死亡率。
The giant pandas' naturally slow breeding rate prevents a population from recovering quickly from illegal hunting, habitat loss, and other human-related causes of mortality.
大熊猫自然繁殖的比率很低限制了种群的快速恢复，来自非法猎取，产地损失，还有其他人为因素影响死亡率。
The giant pandas ' naturally slow breeding rate prevents a population from recovering quickly from illegal hunting, habitat loss, and other human - related causes of mortality.
正如查尔斯·达尔文（Charles Darwin）所观察到的那样，只要有一种基因组成的个体比其他个体更善于繁殖，自然选择就会起作用。
As Charles Darwin observed, natural selection operates whenever individuals of one genetic composition are better at reproducing than that of others.
他们从阿根廷东北部的一个繁殖中心乘车几英里，来到一个170万英亩的自然保护区——格兰伊维拉公园。
They were driven a few miles from a breeding center in northeastern Argentina to a 1.7-million-acre nature reserve called Gran Ibera Park.
人工饲养时他们几乎不可能繁殖——但是瑞士巴塞尔动物园的工作人员成功地再造了它们的自然条件，一批新的小型水母诞生了。
When captive they are incredibly difficult to breed - but staff at Basel Zoo, Switzerland, have managed to imitate their natural conditions and a new batch of tiny jellyfish have been born.
所以我们找出这些有自然差异的猫，再用他们繁殖后代。这不是人为地转变基因。
So naturally divergent cats were found and then bred so there is really no modification of the gene.
病毒拥有基因，能够繁殖并且受制自然选择的进化压力。
Viruses have genes, can reproduce and are subject to the evolutionary pressures imposed by natural selection.
但是细菌和病毒繁殖迅速，因此自然选择可以在短时间内发挥作用，使人们能够观察得到。
Butbacteria and viruses breed fast, so natural selection hastime, within the spanof a human life, to make a difference.
达尔文的理论认为，自然选择倾向于能够促进个体繁殖成效的特性和行为。
In Darwin's theory, natural selection favors traits and behaviors that promote individual reproductive success.
这类顾忌要成为一个问题，其前提必须是：经基因改造的鱼其生存和繁殖能力要比那些经过数百万年的自然选择挑选出来鱼更高。
For that to be a problem, it would have to be the case that the modified fish were better at surviving and reproducing than those honed by millions of years of natural selection.
这种细菌在环境中自然存在，在温水和温暖潮湿的地方可迅速繁殖。
These bacteria are found naturally in the environment and thrive in warm water and warm damp places.
完全有可能等它们繁殖出足够数量的后代以后，将来有一天放它们回归自然，其条件是它们还存活而且猎人不再捕杀。
There is always the chance that enough offspring will be born to return them one day to their natural environment - provided it still exists, and that hunters don't kill them again!
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.
创造嵌入式生物体，很长时间以来是通过繁殖技术，最近一段时间，通过将自然基因组植入去除细胞核的靶细胞中来完成。
Chimeric organisms have long been created through breeding and, more recently, through the transfer of native genomes into denucleated target cells.
海鳗数量的减少会导致海鸟生育能力下降，也就是说，繁殖鸟以及一些重要的鸟类数量会继续减少。 对此，自然保护主义者表示密切的关注。
Conservationists are concerned the drop in productivity, as a result of a lack of sandeels, will mean fewer breeding birds and continued decline of key species.
我们希望老虎能够大量繁殖起来，并且当它们有自然食物资源时不会杀害家畜。
In the hopes that tigers will flourish (and not kill livestock) when they have a natural source of food.
一位在诺丁汉附近Attenborough自然保护区工作的员工声称，已经发生了几起鸟类事件，比如处在繁殖期的Cetti 's warblers被移动电话惊扰。
Staff at Attenborough Nature Reserve, near Nottingham, claimed there had been several cases of birds such as Cetti's warblers being disturbed by mobile phones during the breeding season.
据英国国民托管组织的自然保育专家马修·奥茨解释说，“春天来得太早对很多物种其实是个灾难，因为它们繁殖的太早，后代就很容易受到突如其来的寒潮或降雨影响。 寒冷的冬天让动物能够正常冬眠，而温暖的春天和早早到来的夏天为昆虫创造了理想的环境来大量繁殖，并进而保证了秋天果园、树林和灌木丛里各种浆果的大丰收。”
He said that very early springs can prove disastrous for species who breed too early making their offspring susceptible to unexpected cold or wet snaps later in the season.
米拉克说，海岸红杉可以通过自然克隆过程自我繁殖，也可通过与其他树木杂交繁殖。
Milarch said coast redwoods can reproduce themselves through a natural cloning process and by mating with other trees.
因为自然选择比起健康而言更喜欢繁殖，生物的演化远不及的微生物的繁殖，病原体的进化远远快于人类。
Because natural selection favors reproduction over health, biology evolves more slowly than culture, and pathogens evolve more quickly than humans.
这不同于自然界的生物繁殖技术，因为传统的繁殖技术不会产生不同物种之间的基因转换。
This differs from traditional breeding in that genetic transference between unrelated species does not occur biologically in nature.
迷恋期是自然界确保男人和女人有足够时间繁殖后代的生物学陷阱。
Infatuation is nature's biological trick to guarantee that a man and a woman are thrown together long enough to procreate.
迷恋期是自然界确保男人和女人有足够时间繁殖后代的生物学陷阱。
Infatuation is nature's biological trick to guarantee that a man and a woman are thrown together long enough to procreate.
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