Taking level curvet as an example, the landing stability of horse-vaulting is analyzed mechanically by stages, which is useful for scientific sports.

以水平腾跃为例，对跳马落地稳定性分阶段进行了力学分析，对科学体育运动有一定指导作用。

The postures of these dragons have different characteristics during various ages. Some dragons curve and wreathe, some curvet through the clouds, some march forward leisurely and some are poised.

这些龙的姿态各具时代特色，有的曲体盘绕，有的穿云腾越，有的信步前行，有的蓄力待发。