UNIDENTIFIED MALE: Keeping the watch, vertical surface, vertical surface, vertical surface.

保持观察，垂直表面，垂直表面，垂直表面。

This perceptual glitch meant that in lab tests 90 percent of bats banged into a smooth vertical surface.

这种感知故障意味着，在实验室测试中90%的蝙蝠会撞到光滑的垂直面。

But now this is contact with a vertical surface.

但现在这是与垂直表面的接触。

But a sleek, vertical surface approached at an angle reflects away the echoes, fooling bats into recognizing them as open flyways.

但是以一定角度接近的光滑垂直表面会反射回声，从而愚弄蝙蝠将它们识别为开放的飞行路线。