I've discovered several arachnid tracks outside.

25 species, 13 genera, 7 families of arachnid;

蜱螨7科，13属，25种；

Minute arachnid sometimes found in old papers.

有时出现在旧书纸中的微小的蝎子。

I want that wall-crawling arachnid prosecuted!

我要起诉那个在墙上爬的八脚怪物！

Due to a lack of useful fossil evidence about the history of these arachnids, the same genetic study that placed them in primeval times also used their test results to support a theory that they hark back to a common, ocean-dwelling ancestor.

由于缺少能证明其历史的化石，一个对原始时代的基因研究测试结果同样认为它们的祖先曾居住在海洋里。

It makes sense actually, Gorb said. "we know that all the extremities of ancestor arachnids probably had this possibility to adhere during locomotion, for example, or during prey capture."

这很有可能，戈尔博说，“我们认为所有的蛛形纲动物祖先在行走时可能都具有粘附的本领。比如，在它们捕食的时候。”

Jointed-foot invertebrates: arachnids; crustaceans; insects; millipedes; centipedes.

连足无脊椎动物；蜘蛛类节肢动物；甲壳类动物；昆虫类；倍足纲节动物；蜈蚣类。

Any of various small or minute arachnids of the order Acarina that are often parasitic on animals and plants, infest stored food products, and in some species transmit disease.

蜱螨目的任何一种小的乃至微小的蜘蛛纲动物，通常寄生于动植物体内，也寄生在储藏食物中，有些种还传播疾病。

Tarantulas are the biggest of all the arachnids.

食鸟蜘蛛是所有蛛形纲动物中最大的。

Because masquerading as a bird turd appears to protect certain arachnids from getting eaten by wasps.

因为伪装成鸟粪貌似可以保护某种蛛形动物免受黄蜂吞食。

I don't know from arachnids but spiderman's did.

我不知道蜘蛛纲动物会不会那样，不过蜘蛛侠会。

Of, relating to, or resembling arachnids. arthropod-borne disease

节肢动物的节肢动物的，与节肢动物有关的或类似节肢动物的节肢动物媒介传染病

Any of numerous very small to minute arachnids often infesting animals or plants or stored foods.

各种非常小及微小蜘蛛纲动物，经常寄生在动物或植物或储存的食品中。

Oh well I wasn't aware that arachnids had heads that tingled.

噢，嗯，我没听说过蜘蛛纲动物头会刺痛。

This spider challenges what we thought we knew about arachnids and invertebrates.

狼蛛的这一特性也挑战了人类对蛛形纲动物及无脊椎动物的认知。

About one in 500 of the arachnids carried the virus.

五百只里面就有一只携带这种病毒。

They are true arachnids, closely related to scorpions and spiders.

他们是真正的蛛形纲动物，跟蝎子和蜘蛛有密切关系。

However, they are grouped with arachnids.

然而，它们却被归类为蛛形纲动物。

The present paper reviewed the studies on structural characters of mitochondrial DNA, the improvement of understanding of the hereditary characteristics of mitochondria genome, the mtDNA technology's application of a study on Arachnology;

综述线粒体DNA（mtDNA）的特征、线粒体基因组遗传特性认识的改进和mtDNA分子标记技术在蛛形学研究中的应用；

Machine Sazi Arak, a company that has been sanctioned by the EU, the US and other countries for its work at Iran's Arak heavy water reactor, is listed as a supplier of boilers, heat exchangers and petrochemical equipment.

曾因在伊朗阿拉克（Arak）重水反应堆的工作而受到欧盟（EU）、美国及其他国家制裁的Machine Sazi Arak公司也在该网站的供应商列表之中，显示为锅炉、热交换设备及石化设备供应商。

Iran is building a heavy-water nuclear research reactor at Arak, which it says is needed for the country's agricultural and medical development but which the US and Israel say could allow it to develop a plutonium nuclear bomb.

伊朗正在阿拉克修建一个重水核研究反应堆，并声称这是出于该国农业和医疗发展的需要。不过，美国和以色列认为这会让伊朗得以开发钚核弹。