People like John come together to manage hunting of the goose population in a particular migratory path, or flyway.

像约翰这样的人聚集在起，在特定的迁徙路线上进鹅群的狩猎活动。

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

但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路线。