2.三角形
equilateral triangle 等边三角形 scalene triangle 不等边三角形sosceles triangle 等腰三角形 right triangle 直角三角形 oblique 斜三角形 inscribed triangle 内接三角形
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Man of the world
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Eat the cake and still have it?
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Piece of cake?
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Do you second-guess?
Informed decision?
Well-heeled area?
Let's fall in love
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Back seat?