Researchers observed how spiders reacted to various visitors to their webs—like leaf fragments, courting males, prey like flies, and the assassin bugs.
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Researchers observed how spiders reacted to various visitors to their webs-like leaf fragments, courting males, prey like flies, and the assassin bugs.
研究人员观察了蜘蛛，看它们是如何“招待”它们的蛛网上的各种各样的客人的——有树叶碎片，求爱者，苍蝇之类的猎物，以及猎蝽。
Grace and athletic ism are optional for males in human courtship but both are mandatory in manakin courting.
人类在追求异性时健壮和优雅也可以加分；但在侏儒鸟群里这两者可都是必须的手段。
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