总之，就像我刚才讲的，通过分析这些回声，蝙蝠可以确定，比如说，洞穴里是否有需要避开的墙壁，以及它的距离有多远。
Anyway, as I were saying, by analyzing these echoes, the bat can determine, say, if there is wall in a cave that it needs to avoid, and how far away it is.
回声把歌声带回自己山中的紫色洞穴中，把酣睡的牧童从梦乡中唤醒。
Echo bore it to her purple cavern in the hills, and woke the sleeping shepherds from their dreams.
第八章：洞穴里传来的回声像是有人疯了。最好放下武器并保持安静。
This cave echoes like crazy. Better put the gun away and keep quiet. (ch. 8).
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