1·Black widow spiders also use their webs to ensnare their prey.
黑寡妇蜘蛛也用它们的网诱捕猎物。
2·These spiders spin large webs in which females suspend a cocoon with hundreds of eggs.
这些蜘蛛结成很大的网，雌性蜘蛛在上面用成百上千的卵悬挂茧。
3·Mathematical models have also revealed that food webs may be unstable, where small changes of top predators can lead to big effects throughout entire ecosystems.
数学模型也揭示了食物网可能是不稳定的，顶级肉食性动物的微小改变会对整个生态系统产生巨大影响。
4·Support for this idea came from the observation that long-lasting climax communities usually have more complex food webs and more species diversity than pioneer communities.
支持这一观点的是，长期存在的顶极群落通常比先锋群落有更复杂的食物网和更多的物种多样性。
5·Overfishing not only causes depletion in individual fish stocks, but also disruption to entire ecosystems and food webs in the ocean.
过度捕捞不仅引起个别鱼种的消耗，而且还引起海洋中整个生态系统和食物网的崩溃。