Bats are the only mammals to have wings and to achieve sustained flight.

是唯一有膀且能持续飞行哺乳动物。

The mantid ear -- a single slit -- is sensitive to the ultrasonic "pings" emitted by hunting bats.

螳螂耳朵只有一条裂缝，发出超声波非常敏感。

Spedding and his colleagues think that the unique aerodynamic wake signatures of bat wings are caused by different mechanical operations in the upstroke of the wingbeat.

斯佩丁和同事们认为，独特气动签字后，膀所造成不同机械操作，在upstrokewingbeat 。