Some five years ago, high school seniors in America generally spent more than six hours a day on electronic devices.
大约五年前，美国高三学生每天花在电子设备上的时间一般超过六小时。
We say that we have very very short lives, because after all right now I've got some memories that I didn't have 2 hours ago.
我们的人生非常短暂，我现在就有一些，我2小时前没有的记忆。
Some years ago, the researcher James Gilligan was called into a prison to try to help out with an inmate who kept assaulting guards, even after he was placed in solitary confinement 24 hours a day.
许多年以前，研究者JamesGilligalligan 应邀进入一所监狱，试图帮助一名总是攻击看守的犯人走出困境，这名犯人被24小时单独拘禁。
I just spent two hours listening to Bill sing the blues about his girl friend leaving him for some other guy. I feel sorry for him but he ought to forget it: after all, it happened two years ago.
他刚花了整整两小时听Bill诉说女朋友怎么甩掉他跟了别人的伤心事。他当然为Bill感到难过，但是他觉得Bill该把这事丢在脑后了，因为这毕竟是两年前的往事了。
John went out a few hours ago to do some shopping, but hasn't returned yet.
约翰数小时前外出购物，但还没有回来。
Imagine 10 years ago, deliver one thing from Beijing to Hangzhou took about 8 days. Now you can deliver things from Beijing to Inner Mongolia, some cities within 12 hours.
10年前从北京到杭州的邮寄得8天，现在12个小时就能从北京送货到内蒙古，物流效率在提升。
Imagine 10 years ago, deliver one thing from Beijing to Hangzhou took about 8 days. Now you can deliver things from Beijing to Inner Mongolia, some cities within 12 hours.
年前从北京到杭州的邮寄就要8天，现在12个小时就能从北京送货到内蒙古城市，物流效率提升了。
Imagine 10 years ago, deliver one thing from Beijing to Hangzhou took about 8 days. Now you can deliver things from Beijing to Inner Mongolia, some cities within 12 hours.
年前从北京到杭州的邮寄就要8天，现在12个小时就能从北京送货到内蒙古城市，物流效率提升了。
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