Einstein looked down and found that Newton was standing on a square floor board with one metre long and one metre wide. He didn't understand.
爱因斯坦低头，看到牛顿站在一块长、宽都是一米的正方形地板砖上，大为不解。
Einstein looked down and found that Newton was standing on a square floor board with one metre long and one metre wide. He didn't understand.
爱因斯坦低头，看到牛顿站在一块长、宽都是一米的正方形地板砖上，大为不解。
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