袋鼠身上有各种各样的寄生虫。
寄生物传播的方式之一就是透过排泄物。
One of the ways the parasite spreads is through faecal matter.
全球变暖将会意味着热带寄生虫病的传播吗？
Will global warming mean the spread of tropical parasitic diseases?
这些症状也许是由病毒感染引起的，而与寄生虫无关。
These symptoms may be referable to virus infection rather than parasites.
寄生虫通常比它们的宿主小。
自然选择偏爱那些最容易找到寄主并以之为食的寄生虫。
Natural selection favors the parasites that are best able to find and feed on hosts.
血吸虫病的诊断方法是，检测粪便或尿液标本中寄生虫卵。
Schistosomiasis is diagnosed through the detection of parasite eggs in stool or urine specimens.
共生关系主要有三种类型：寄生关系、共生关系和互惠关系。
There are three main types of symbiotic relationships: parasitism, commensalism, and mutualism.
有时，在宿主-寄生虫关系中观察自然选择的影响实际上是可能的。
At times, it is actually possible to watch the effects of natural selection in host-parasite relationships.
与博弈论直接相关的是某些具有大量过剩雌性的寄生蜂种类的性别比例。
Immediately relevant to game theory are the sex ratios in certain parasitic wasp species that have a large excess of females.
寄生虫的一个典例是绦虫，它生活在更大的动物的肠道内，从宿主那里吸收营养。
An example of a parasite is a tapeworm that lives inside the intestines of a larger animal and absorbs nutrients from its host.
立克次氏体是一种细菌，这种细菌可引起多种疾病，并通过吸血节肢寄生动物传播。
Rickettsia is a bacterium which can cause many diseases that are transmitted by blood-sucking parasitic arthropods.
寄生是一种捕食者与被捕食者之间的关系，寄生者利用共生伙伴——宿主来获取食物。
Parasitism is a kind of predator-prey relationship in which one organism, the parasite, derives its food at the expense of its symbiotic associate, the host.
那些更容易感染疾病和寄生虫的男性将不得不使用他们的类胡萝卜素来增强他们的免疫系统。
Males that are more susceptible to disease and parasites will have to use their carotenoids to boost their immune systems.
在1950年，粘液瘤病毒，一种影响兔子的寄生虫，被故意引入澳大利亚来控制兔子的数量。
In 1950, myxoma virus, a parasite that affects rabbits, was deliberately introduced into Australia to control the rabbit population.
20世纪60年代末期，当斯里兰卡繁荣的椰子果园被潜叶昆虫侵扰时，一种从新加坡引进的寄生幼虫将这种害虫控制住了。
In the late 1960s, when Sri Lanka's flourishing coconut groves were plagued by leaf-mining hispides, a larval parasite imported from Singapore brought the pest under control.
实验室测试表明，这些千足虫体内的分泌物富含两种化学物质，这两种物质是有效的驱蚊剂，而蚊子携带的寄生虫会削弱卷尾猴的能力。
Laboratory tests show that secretions from the bodies of these millipedes are rich in two chemicals that are potent mosquito repellents, and mosquitoes carry parasites that debilitate capuchins.
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.
如果他们发现一棵树上有槲寄生，部落会停止一段时间的战斗。
Tribes would stop fighting for a period of time if they found a tree with mistletoe.
这是一个寄生虫疾病分布和预防的图集，其中包括了蛔虫、钩虫和鞭虫。
It's an atlas of the distribution and prevalence of helminth diseases, including roundworm, hookworm, and whipworm.
我们依赖于我们的煎锅就像绵羊依赖它们体内的寄生虫一样，如果你只吃生食，你就会饿死。
We are as dependent on our frying pans as sheep are on their internal fellow travellers, for if you eat nothing but raw food you will starve to death.
CIBC还在完善培育寄生虫的技术，这些寄生虫以“disapene scale”昆虫为食。
CIBC is also perfecting the technique for breeding parasites that prey on "disapene scale" insects.
女神弗雷娅的儿子被一支用槲寄生制成的箭杀死，所以为了纪念他，她宣布这支箭将永远是和平的象征。
The goddess Freya's son was killed by an arrow made of mistletoe, so, in honor of him, she declared that it would always be a symbol of peace.
它们将一种叫作克氏锥虫的寄生虫排到其粪便中。
They pass a parasite called trypanosoma cruzi in their faeces.
南美小国圭亚那境内有一种名为班氏线虫的寄生虫。
In the tiny South American nation of Guyana lives a problematic parasite called Wuchereria bancrofti.
南美小国圭亚那境内有一种名为班氏线虫的寄生虫。
In the tiny South American nation of Guyana lives a problematic parasite called Wuchereria bancrofti.
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