我一觉醒来钟正好打十二点: the moment the clock struck twelve i chanced to wake up. exactly
一觉醒来发现还可以睡上几小时: waking uand realizing you still have a few hours left to sleepwaking up and realizing you still have a few hours left to sleep
不知不觉: imperceptibly; unconsciously; unwittingly; unknowingly; not knowing and not feeling; without one's noticing it 短语和例子他们睡了好几个小时, 不知不觉, 东方已破晓了。 they had a good sleep of a few hours without th