Perhaps one useful hint about the original function of sleep is to be found in the fact that dolphins and whales and aquatic mammals in general seem to sleep very little.
海豚、鲸鱼以及水生哺乳动物睡眠都极少，这一事实可以给睡眠的根本功能提供有用的线索。
Perhaps one useful hint about the original function of sleep is to be found in the fact that dolphins and whales and aquatic mammals in genera seem to sleep very little.
有迹象表明，这两种类型的睡眠，有梦和无梦的，在很大程度上取决于动物的生活习惯，食肉动物在统计上是更容易做梦超过猎物，依次更加有可能经历无梦的睡眠。
However, this does not reliably describe all Bluetooth profiles and services supported by the device, but is useful as a hint to the device type.
但是，它没有描述所有的蓝牙配置和设备支持的服务，它只是暗示了设备的类型。
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