比如For example 证明proof 解solution 显然obviously 因为because （of） 当while 假设hypothesis 三角形triangle 平行四边形parallelogram 四边形quadrilateral 圆round 梯形trapezoidal 菱形diamond 正方体cube 长方体cuboid 圆柱cylindrical。
e picture that day as far in the future. When we are in buoyant health, death is all b
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