Actually, there are some species of bats, the ones that don't use echolocation that do rely on their vision for navigation, but it is true that for many bats, their vision is too weak to count on.

事实上，有一些品种的蝙蝠不使用回声定位，而是依靠视觉来导航，但对很多蝙蝠来说，它们的视觉太弱了，确实不能依靠。