经过数百个小时的观察，他们感到沮丧。有一天，他们注意到一个女人拿着纸巾在做一件人们一直在做的事情：把东西擦干净，然后扔掉纸。
Frustrated after hundreds of hours of observation, they one day noticed a woman do with a paper towel what people do all the time: wipe something up and throw it away.
小时候的艾恩观察了一些人，他们虽然贫穷、残疾或生病，但仍然乐观有朝气地面对生活。
Eyen as a child observed people who were poor or disabled or ill, but who nonetheless faced life with optimism and vigor.
按说两个小时就能走完城墙，但我们在不同的大门和瞭望塔上停下来拍照，或只是观察当地人的日常生活。
Supposedly you can do it in two hours, but we stopped at the different gates and watchtowers to take pictures or just to watch the local people going about their daily routines.
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