Instead, you have to go for a walk, ride a bike, or swim at least an hour.

相反，你必须至少花一个小时走路，骑车或者游泳。

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Take a bike ride, go skating, play basketball, and do something active!

骑自行车，去滑冰，打篮球，做一些积极的事情！

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Whether it is to go shopping or watch a film, ride a bike instead of driving a car.

无论是去购物还是看电影，都骑自行车而不是开车。

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The girls -- 8-year-old Elizabeth Collins and 10-year-old Lyric Cook -- were last seen by their grandmother on Friday when they left to go on a bike ride, authorities said.

CNN: Mom: Dogs searching for Iowa girls stopped at edge of lake

His typical routine would be to wake up at noon, work from 2pm to 10pm, have dinner then go on a bike ride in the still-clear light, returning at 1am for a little dessert.

BBC: Living in towns without light

First, though, Obama says he plans to take the weekend off, go on a date with his wife and a bike ride with his two daughters.

NPR: Obama Meets with Clinton After Va. Campaign Stop