translation.en: Now, what I mean by echolocation -- they emit a sound from their larynx out through their mouth or through their nose. This sound wave comes out and it reflects and echoes back off objects in their environment, and the bats then hear these echoes and they turn this information into an acoustic image.
translation.zh: 我所说的回声定位是指 蝙蝠用喉咙发出声音经过嘴巴 或经过鼻子。声波发射出去 声波碰到周围的物体反射返回， 蝙蝠便会听到这些回声 它们把这些信息转变成声像图。