它使酣睡者进入部分清醒的状态，从而最大限度地发挥主叫闹钟的作用。

It brings the sleeper to a state of partial consciousness, thus maximizing the effect of the main alarms.

youdao

它使酣睡者进入部分清醒的状态，从而最大限度地发挥主叫闹钟的作用。

It brings the sleeper to a state of partial consciousness, thus maximizing the effect of the main alarms.

youdao