请根据下面提示，写一篇短文。词数不少于50。
You are discussing the following picture with your classmates. Now you are telling them how you understand the picture and what makes you think so.
提示词：电动扶梯 escalator
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请根据下面提示，写一篇短文。词数不少于50。
You are discussing the following picture with your classmates. Now you are telling them how you understand the picture and what makes you think so.
提示词：电动扶梯 escalator
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