Why do you always have to echoback my opinions like this?
你为什么总是这样非附和我的意见不可呢？
2
The sound waves from these cries bounce off objects and echoback to the bat's ears.
从这些叫声中传出的声波，被物体弹回，回声传到蝙蝠的耳里。
3
Such surfaces reflect most of the bats' echolocation energy away from it, but some energy hits the surface perpendicularly, sending an echoback directly beneath the bat.