使一块板的几个角成直角。

Square the corners of a board.

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纸的两个纸规边要成直角。

The side of a right triangle opposite the right angle .

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你的身体与墙壁成直角。

You are standing at a right Angle to the wall.

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你的身体与墙壁成直角。

You are standing at a right Angle to the wall.

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