isosceles trapezium
常见例句
- Whatever the case, the shape of the cross-section of the said sphenoid part is either of an isosceles spherical trapezium or of any spherical quadrilateral.
无论哪种情况，楔形体的横截面形状要么是有两条边相同的球形四边形，要么是任意球形四边形。
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