A new and rare species of "giant" orb web spider has been discovered in Africa and Madagascar.

非洲和马达加斯加发现一种新的稀有物种，巨网蜘蛛。

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Clever spiders a chemical used by golden orb web spiders to keep ants at bay could make a useful pest control agent, say researchers.

研究者说。聪明的蜘蛛利用一种自身的化学制品A把蚂蚁困在他们的金色圆形蜘蛛网里，这样蜘蛛就变成了一个害虫防治机构。

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"Dragline" silk is used to create the supporting strands that anchor the endpoints of an orb web to tree branches overhanging rivers or lakes and forms the radial threads in the web.

“牵引”蛛丝作为支撑股，用来将圆网的一个个终点固定在外悬在河湖之上的树杈上，形成一种辐射状。

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