雅思考试词汇分类辅导:几何形状词汇
triangle 三角形;
square 正方形;
rectangle 长方形;
trapezoid 梯形;
pentagon 五边形;
oval 椭圆形;
sector 扇形;
pyramid 金字塔;
cube 立方体;
cylinder 圆柱体;
cone 圆锥体;
concave 凹面;
convex 凸面
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