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.
在脊椎动物中，免疫系统提供了对体内寄生虫的多重防御。
In vertebrates, the immune system provides a multiple defense against internal parasites.
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.
事实上，骚痒和抓挠帮助动物去掉寄生虫、植物体或其它不想要的垃圾。
In nature, itching and scratching help animals get rid of parasites, plant material, or other unwanted baggage.
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.
动物有寄生虫或携带各种各样的病毒。一旦传染给人类，这将会是非常麻烦的事。
Animals have parasites or carry a variety of viruses. Once transmitted to humans, it would be a very troublesome thing.
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.
在这个话题中，最干净、最高度进化的生物可能是体内寄生虫，以及蜜蜂、黄蜂和蚂蚁幼虫。
It's possible that the cleanest and most highly evolved creatures where this topic is concerned are internal parasites, along with bee, wasp and ant larvae.
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.
迎客主人一把抓过账单，对出租司机大骂不止，称他是一文不值的寄生虫，并说他企图向游客多收费，真是丢尽了他们国家的颜面。
The host grabbed the bills and initiated a verbal assault upon the cabby, calling him a worthless parasite and a disgrace to their country for trying to overcharge visitors.
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.
他们只不过是一帮靠别人生活的寄生虫！
这条狗体内有寄生虫。
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.
人们已经证实细菌确实寄生在机舱舱面上，所以你应该注意经常洗手。
Bacteria have been shown to live on cabin surfaces, so wash your hands frequently.
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.
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.
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