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maths square units are used for measuring the area of something (表示面积单位)平方的 The police have an area of over 200 square miles to search. 警察要搜索200平方英里以上的地方。
The room couldn't have been more than four yards square. 这个房间不会超过4平方码。
The sign should be no more than one square metre in area. 牌子的面积应不大于1平方米。
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