"the winner was a true sleeper--no one expected him to get it"
"the British call a railroad tie a sleeper"
"that movie was the sleeper of the summer"
sleeper是什么意思
sleepily是什么意思
sleepiness是什么意思
sleeping是什么意思
sleepless是什么意思
sleepwalker是什么意思
sleepwalking是什么意思
sleepwear是什么意思
sleepy是什么意思
sleepyhead是什么意思