Researchers collected wild dragonfly larvae, and placed them in tanks with fish or insect predators.

研究人员们采集了野生蜻蜓的幼虫，把它们与鱼类或食昆虫的生物们放在一起饲养。

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Researchers collected wild dragonfly larvae, and placed them in tanks with fish or insect predators.

研究人员们采集了野生蜻蜓的幼虫，把它们与鱼类或食昆虫的生物们放在一起饲养。

youdao