n.(长及膝盖、腰间束带的)男睡衣
I usually go up to London on the sleeper.
我一般都乘卧车去伦敦.
Please don't make any noise — my mother's a very light sleeper.
请安静——我母亲睡觉很轻.
She was usually a light sleeper.
她通常很容易惊醒。