海豚的大脑由完全隔开的两部分组成，当其中一部分工作时，另一部分充分休息，因此，可终生不眠。

Porpoise's cerebrum by two parts which completely separates is composed, when one part of work, another part of full rests, therefore, but is life-long does not sleep.

youdao

海豚的大脑由完全隔开的两部分组成，当其中一部分工作时，另一部分充分休息，因此，可终生不眠。

Porpoise's cerebrum by two parts which completely separates is composed, when one part of work, another part of full rests, therefore, but is life-long does not sleep.

youdao