因细菌、病菌一般生命周期很短，不能繁殖的细菌、病毒就会迅速死亡。
Due to bacteria, virus life cycle is very short in general, can not breed bacteria, viruses will be rapidly killed.
既然它们能够而且确实可以成功杂交繁殖，它们就不能被归为不同的物种。
Since they can and do successfully inter-breed, they cannot be classed as different species.
同样，如果一种植物或动物没有留下任何可以繁殖的后代，它就不能把所有的能量浪费在使自己变得更强壮上，因为这是最可能走向灭绝的方式。
Similarly, a plant or animal cannot squander all its energy on growing a big body if none would be left over for reproduction, for this is the surest way to extinction.
然而，要使这些家庭储水器没有蚊子繁殖，只需采取简单措施：将储存的饮用水覆盖，使蚊子不能在那里产卵。
Yet, keeping these household water collections free from mosquito breeding only requires simple measures: storing drinking water under cover so that mosquitoes cannot deposit their eggs.
为什么花时间和精力去做不能提高繁殖率的事情？
Why expend time and energy in activities that fail to increase reproductive success?
我们再也不能考虑通过在学校饮水器里添加抗生素来保护孩子们的健康，因为我们知道这样会导致抗药性细菌的繁殖。
We would never think of trying to keep our children healthy by adding antibiotics to school water fountains, because we know this would breed antibiotic-resistant bacteria.
当一种动物不能在每一代都繁殖出足够的后代而与其死亡率保持一致时，它就会逐渐灭绝了。
An animal species becomes extinct when it fails to produce enough young in each generation to keep pace with the death-rate.
由于山羊和绵羊的染色体数目不匹配(分别为60和54)，由此产生的后代，如果它能够存活下来，也是不能够繁殖的。
Because goats and sheep have mismatched Numbers of chromosomes (60 and 54, respectively), the resulting offspring, if it survives, is sterile.
由于这些鸟进行杂交繁殖，不能把它们归为不同的物种。
Since the birds interbreed they cannot be classed as different species .
“关键在于：你能不能找到好的干细胞群然后加以繁殖。”她说。
'the key is whether you can find a good stem cell population and expand it,' she said.
一个洞内只有一只螃蟹，除繁殖期以外它们都是孤独的，并且不能容忍洞中的入侵者。
Only one crab lives in a burrow and outside of the breeding season Red Crabs are solitary, and do not tolerate intruders into their burrows.
然而，GM小麦的捐赠，也导致了小农经济的动荡，因为GM小麦品种不能在当地繁殖。
The donation of GM wheat, however, also led to destabilizing the small peasant economy because the GM wheat varieties could not reproduced locally.
在哺乳动物和有关它们繁殖的生理学与胚胎学之间存在太多的差异，因而不能保证不会生出畸形的胎儿或婴儿。
There are too many differences between mammals and their reproductive physiology and embryology to be sure that no deformed foetus or infant would be born.
由于这些鸟进行杂交繁殖，不能把它们归为不同的物种。
Since the birds interbreed they cannot be classed as different species.
一个主要的原因就是不像一年生植物，大多数林木经过砍伐之后，不能马上繁殖。
A principal reason was that most trees, unlike annual plants, cannot readily be propagated from cuttings.
如果金钱不能自我繁殖的话，我们如何解释财富不断聚集在少数人的手中呢？
If money as such does not multiply on its own, how are we to explain the accumulation of wealth in the hands of the few?
你所有的繁殖和除以10000不，不能改变，因为十进制和二进制场所是不可通约的。
All your multiplying and dividing by 10000 doesn't and cannot change that, because decimal places and binary places are incommensurable.
高加索人经常自己保留幼犬因为绝大多数高加索地区的狗不能活到很老。所以替代繁殖是必需的。
They often keep the puppies for themselves because most of the dogs in the Caucasus cannot live to an old age and new replacements are always needed.
迁入的白背飞虱拒绝在春江06上着陆，也不能在其上繁殖种群；而白背飞虱更趋向于在汕优63上定居，并繁殖良好。
WBPH immigrants rejected to land and failed to establish colonies on CJ-06, while they preferred to settle and well reproduced on SY-63.
问题：你是一个真菌，只能在一个确定的温度，湿度，距地面的位置和距离繁殖，但是自己又不能通过移动找到这个完美的地点。
Problem: you're a fungus that can only flourish at a certain temperature, humidity, location and distance from the ground but can't do the legwork to find that perfect spot yourself.
肿瘤自然的高基因突变率通常导致ctvt线粒体基因不能正常工作，造成它们失去了繁殖力。
A naturally high rate of genetic mutation in cancers regularly leads to non-functional genes in the CTVT mitochondria, which causes them to lose productivity.
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?
这些海洋正变得非常有毒，以至于不能支持我们的提升形体，而因此我们正在寻找新的和不寻常的地方来繁殖，并寻找新的和不寻常的路径来迁徙。
Such oceans are becoming too toxic to support our ascending forms, and so we are finding new and unusual places to birth and new and unusual paths for migration.
因此，宜宾成了竹燕窝最集中的产地，但由于竹燕窝野生量非常小，人工不能繁殖，市场需求旺盛，竹燕窝价格节节攀高。
Therefore, YiBin, becomes the most concentrated place. However, the price of the bamboo birds nest is rising and rising because product doesn't meet the market demand.
母猪不孕症是母猪生殖机能发生障碍，暂时或永久性不能繁殖后代的病理现象。
Sterility of sows refers to a pathological phenomenon of permanent or temporary inability to conceive or produce an offspring, triggered by procreation dysfunction of the sows.
即使如此，任何实验工作者仍不能预料剩下的片段中哪个将无性繁殖。
Even so, on experimenter can predict which of the remaining fragments will be cloned.
这样企鹅就不能成功繁殖。今天企鹅又面临海洋油污染而减少食物的供给。
Today, the birds face continuing hurdles from oil pollution and a dwindling food supply.
这样企鹅就不能成功繁殖。今天企鹅又面临海洋油污染而减少食物的供给。
Today, the birds face continuing hurdles from oil pollution and a dwindling food supply.
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