They walk fast on the pavement.
他们在人行道上快步急走。
If you start to walk fast you'll soon start to feel nervous.
如果你开始走快点,你很快就会感到紧张。
我走得很快,但我不跑。
Second, he looked at these people and measured how fast they walk from where their experiment was to the elevator.
第二,他观察这些人,记录他们从实验地点,走到电梯的时间。
When that was the case if you wanted fast food you had to at least spend the calories to get out of your car to walk into the place to buy the fast food.
那个时候,如果你想吃快餐,起码你得花力气打开车门,走进快餐店购买食物
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