研究：警察广泛存在睡眠障碍

短语讲解：

1. The researchers say the result can be impaired job performance, as well as a variety of health problems.

a variety of多种的,各种各样的
例句：This shop sells a variety of toys.
这家商店出售各种各样的玩具。

2. That made apnea the most common sleep disorder by far.

by far…得多, 更, 尤其
例句：That is by far the best choice.
那是最好的选择。

3. Rotating shifts have something to do with the large number of police officers with sleep problems.

do with与…有关
例句：I'm interested in anything to do with music.
凡与音乐有关的事我都感兴趣。

4. Czeisler says Massachusetts required its state troopers to pass a fitness test, and equipped each police barracks with a fitness center.

equip with装备, 配备
例句：They equipped themselves with a pair of sharp axes and set off for the forest.
他们带上两把利斧便朝森林走去。

5. They also made it a requirement that every state trooper spend an hour exercising on each one of their shifts.

spend on把…花在…
例句：He doesn't spend much time on his homework.
他花在作业上的时间不多。

6. And that was paid time to work out in those gym facilities.

work out 锻炼
例句：These athletes work out at the gym for two hours every day.
这些运动员每天都要在体育馆锻炼两个小时。

7. The researchers say they think the fitness program resulted in lower rates of obesity.

result in导致,结果是
例句：The flood resulted in a considerable reduction in production.
这次水灾造成相当大的减产。

8. That, in turn, could help reduce the rate of sleep apnea.

in turn反过来
例句：All theories originate from practice and in turn serve practice. 
任何理论都来源于实践,反过来为实践服务。