In this paper, the forced rolling movement about the symmetry axis at a fixed Angle of attack is numerically simulated.

采用数值模拟方法模拟了乘波飞行器在固定迎角下绕其对称轴强迫滚转运动这一过程。

youdao

The volunteers in this study were taught how to turn a fall into a rolling movement by bending and twisting the torso and neck.

在这项研究中，志愿者被教导如何通过弯扭脖子和躯干将跌倒转为滚动运动。

youdao

The results show that the friction coefficient in rolling condition fluctuates with time and the period is equal to that of rolling movement.

结果表明：摇摆条件下摩擦阻力系数随时间周期性波动，波动周期等于摇摆运动周期。

youdao

Keeping this in mind while watching a murmuration brings a new logic to the swelling, rolling movement exhibited by the flock as flight changes ripple through it.

ENGADGET: Editorial: Tech is a flock of starlings

Named the Best Documentary of the year by the National Board of Review, and cited by the American Film Institute as one of the year's best movies, WAITING FOR "SUPERMAN" was called "an electrifying call to action" (Peter Travers, Rolling Stone), and has launched a movement to achieve real and lasting change in the nation's schools.

ENGADGET: Waiting for Superman Blu-ray dated February 15th with HD special features & donation credit