Duration of sleep

• 睡眠时间

Duration of sleep的用法和样例：

例句

1. The big project has robbed Bill of his sleep over the weekend.
   这个大项目剥夺了比尔周末的睡眠时间。
2. HCG significantly enhances paradoxical sleep in the female rabbits.
   静脉注射绒毛膜促性腺激素可使雌兔异相睡眠时间延长。