When dolphins sleep, the brain only half in the rest, the other half awake to help breathingcycle.
当海豚睡觉的时候，大脑只有一半在休息，另一半还醒着以助呼吸循环。
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Breathing is a universal foundation for meditation practice. Each breath is like the cycle of life itself - being born, coming to maturity, fading away, and finally dying.