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傍晚,安培在街头散步,突然想到一道物理题目,就从口袋里掏出粉笔,下意识地向前面的一块黑板走去,在黑板上演算起来。可是,黑板竟开始向前移动!
In the evening, when Ape walked the streets and suddenly thought of a physical issue, he took out chalk from his pocket and walked unconsciously toward the blackboard in front of him. However, the blackboard actually began to move forward!