Walking And Sleeping 散步和睡觉
And what if at at night, when they are sleeping in their beds, they hear a man walking abroad long before sunrise?
假设是夜晚，他们睡在床上，听到有人远在日出前走出了门外，那会怎样？
Some can take place in parallel, like walking and singing;others are mutually exclusive, such as sleeping and playing the piano.
有些如步行和唱歌能够同时发生，有些会互相排斥，如睡觉和弹奏钢琴。
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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