Kangaroos harbour a vast range of parasites.

袋鼠身上有各种各样的寄生虫。

These symptoms may be referable to virus infection rather than parasites.

这些症状也许是由病毒感染引起的，而与寄生虫无关。

Parasites are usually smaller than their hosts.

寄生虫通常比它们的宿主小。

Natural selection favors the parasites that are best able to find and feed on hosts.

自然选择偏爱那些最容易找到寄主并以之为食的寄生虫。

In nature, itching and scratching help animals get rid of parasites, plant material, or other unwanted baggage.

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。

Animals have parasites or carry a variety of viruses. Once transmitted to humans, it would be a very troublesome thing.

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。

Males that are more susceptible to disease and parasites will have to use their carotenoids to boost their immune systems.

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。

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.

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。

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.

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。

In vertebrates, the immune system provides a multiple defense against internal parasites.

在脊椎动物中，免疫系统提供了对体内寄生虫的多重防御。

CIBC is also perfecting the technique for breeding parasites that prey on "disapene scale" insects.

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。

Two parasites Ancylostoma duodenale and Necator americanus cause hookworm disease.

两种寄生虫为十二指肠钩虫和美洲轮虫引起钩虫病。

Artemisinin is also a promising potent drug in the treatment of cancer, human parasites such as pneumocystosis.

青蒿素还是一种有前途的有效药物，可用于治疗癌症，人类寄生虫，如肺囊虫病。

Iit can be used to against hook worms, roundworm, pinworm, whipworm, Strongyloides stercoralis and other intestinal parasites.

它可用于防治勾虫、蛔虫、蛲虫、鞭虫、粪类圆线虫等肠道寄生虫病。

They are parasites on America.

他们是美国的寄生虫。

A: Malaria is caused by parasites.

答：疟疾是由寄生虫引起的。

But what about parasites?

可这又干寄生虫什么事呢？

Did parasites drive human evolution?

寄生虫催使人类进化？

Malaria is caused by Plasmodium parasites.

疟疾是由疟原虫属寄生虫所致。

But they've got parasites to look out for too.

但是，他们也有许多需要照顾的寄生虫。

The parasites also have different effects.

再者，两种寄生虫产生的病征也不同。

They are also better able to fend off parasites.

他们抵御寄生虫的能力更强。

Do we want our children exposed to more parasites?

要让我们的孩子多暴露在有寄生虫的环境中？

Boiling water kills harmful bacteria and parasites.

沸水杀死有害细菌和寄生虫。

The parasites evolved, for example, in separate hosts.

例如寄生虫都是在不同的寄主身上进化的。

The strange thing is, they may have parasites to thank.

奇怪的是，入侵成功还得感谢寄生虫的帮忙。

Malaria is caused by parasites that are transmitted by mosquitoes.

疟疾是由蚊虫传播的寄生虫导致的。