在这期间，一些哺乳动物与一些无飞行能力的大型鸟类对这个世界也有过当家作主的经历，之后它们就灭绝了。

During this time mammals, along with some large flightless birds, did take over. Then they became extinct.

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尽管科学家对大范围蝙蝠死亡一直深表关切，但有关这种飞行哺乳动物的研究尚在推进之中。

Though scientists remain extremely concerned about widespread bat death, research on the mammalian fliers continues.

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但上百种植物利用蝙蝠来进行传粉，研究者们仍然在研究这些飞行的哺乳动物究竟如何识别各种植物。

But hundreds of plant species use bats to pollinate, and researchers are still teasing out how the flying mammals home in on the plants.

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