fall into a deep sleep 酣睡 ; 进入酣睡状态
When I am getting old, fall into deep sleep.
当我年老白了头，睡意稠。
According to researcher from American and French, the "Sharp Wave Ripple" in brain which is responsible for strengthen memory can only appear when people fall into deep sleep.
美国和法国的研究者支出，大脑中的“尖波涟漪”专门负责记忆，这种涟漪只会在深度睡眠的状态下出现。
She will fall into a deep sleep that will last one hundred years, "There was a great hubbub in the hall as everyone discussed the events."
大厅里每个人都在谈论这件事情，非常吵闹。
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