Of the some 900 species of bats,more than half rely on echolocation to detect obstacles in flight,find their way into roosts,and forage for food.

 
  • 在约900种蝙蝠中,一半以上依靠回一定位法探测飞行中的障碍物,寻找回巢的路线和用作食物的饲料。
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