He fell into a deep dreamless sleep.
他酣然入睡，一夜无梦。
On this occasion, he had fallen at once into a dreamless sleep.
这一次，他立刻进入了无梦的睡眠。
I can picture being in dreamless sleep quite easily.
我能够轻而易举地想象无梦的睡眠。
There is nothing that it's like to be in dreamless sleep.
没有感觉可以形容无梦的睡眠。
He fell into the dreamless sleep which rounded off his past.
他睡着了，睡得非常沉，好象把过去的岁月全。
Of course you believe that at times you're in dreamless sleep.
你当然是相信有时你能进入无梦睡眠的。
Within the hour he had slipped once again into deep and dreamless oblivion.
不出一小时，他再次陷入了无梦的沉睡。
Within the hour he had slipped once again into deep and dreamless oblivion.
不出一小时，他再次陷入了无梦的沉睡。
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