一、关于睡doze off 无意中睡着。a cat nap: 小睡(可以在任何地方睡)。hit the sack/hay: 躺下睡觉。catch some z's 睡觉。not sleep a wink完全没有睡着。saw logs 打鼾。
When you sleep in， you remain in bed until later than usual. This is what we usually do on Saturdays and Sundays， provided we get the chance.冒着工作、上班等迟到的风险关掉闹钟睡回笼觉，这是不是很多人每天生活的真实写照?
The best way to get used to a sleeping routine is to set a specific time each night that you will go to bed.
没人能证明这句话到底是真是假，但至少美国犹他州一位叫作西恩 的大叔坚决不服。取自美国的一句谚语——“a lion doesn't lose sleep over the opinion of sheep”，翻译过来叫“狮子不会因为羊的意见而失眠”。
