They have very keenly developed echo location sonar sense associated with their brains that is a unique feature of toothed whales.
它们有与大脑相关的非常发达的回声定位声纳感觉,那是齿鲸独一无二的特点。
They just have the added benefit of echo location to operate in the dark.
他们只是有回声定位的额外好处,可以在黑暗中操作。
Echolocation is the use of "sound" as a form of navigation
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