蜘蛛纲

寄生在动物和植物体上非常小的非寄生类蜘蛛纲动物；与扁虱有关。

Very small free-living arachnid that is parasitic on animals or plants ; related to ticks .

我不知道蜘蛛纲动物会不会那样，不过蜘蛛侠会。

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

蜘蛛纲动物有四对腿还有两个身体部分。

Arachnids have four pairs of legs but only two body parts .

噢，嗯，我没听说过蜘蛛纲动物头会刺痛。

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

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。

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

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。

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 .

1980～1991年研究表明，沈阳等地玉米田蚜虫天敌有昆虫纲13种，蜘蛛纲2种，真菌1种。

The natural enemies of maize aphids were studied in Shenyang from 1980 to 1991 . The result showed that there were 13 species insects in Hexapoda , 2 species in Arachnoidea and 1 species in fungus .

本文对中国广西壮族自治区洞穴蜘蛛（蛛形纲：蜘蛛目）进行了分类学研究。

The present dissertation deals with the taxonomy of cave spiders ( Arachnida , Araneae ) from Guangxi , China .