adj.无眠的；睡不着的；警觉的
She was worn-out after three sleepless nights. 三夜未眠之后，她已筋疲力尽了。
He was lying on the sleepless bed. 他躺在床上睡不着。
The situation gave her many sleepless nights. 这种情况害她一连好多天睡不好觉。
Her irresponsible behaviour cost her father many sleepless nights. 她那不负责任的行为使她父亲许多夜不得安眠。
Because of the cold weather, they are now preparing for a sleepless night. 由于寒冷的天气
The snake frightened the skinny boy. He had a sleepless night. 那个瘦小的男孩被蛇吓坏了,整晚上都很警觉。
n.失眠
