四边

A kite is a quadrilateral with one line of symmetry.

风筝个有一条对称线的四形。

A prismatoid having polygons with the same number of sides as bases, and faces that are parallelograms or trapezoids.

四个相等的平行四形；角的等平行四形。

Book letter putamina by quality requirements, the four sides then use bamboo scratch tight wrapping to prevent curling down and up empty.

书封壳在按质量要求做好后，四再用竹刮刮紧包，防止包紧及起空。

In this chapter, we partially solve the problem of inner radius of univalence for some parallelogram, applying the properties of extremal sets of Schwarz derivatives.

在这一章中用Schwarz 导数极值集的重要性质部分的解决了几类平行四形的单叶性内径。