Walking or sleeping, this subject was always in my mind.
不论是走路或睡觉，我总是在想着这个问题。
Thousands of pictures were posted on micro blogs showing frustrated drivers walking their dogs, playing tennis or sleeping in their vehicles.
成千上万的照片被贴在了微博上，上面有沮丧的司机在遛狗、打网球或是在车里睡觉。
You are doing it all the time, when you are walking, speaking, eating, or even sleeping and no matter where you are.
无论是在走路、说话、吃东西甚或是睡觉的时候，也不管你身处何方，你都在做着这件事。
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