The missile travels at subsonic velocity to maintain stability.

这枚导弹以亚音速的速度飞行以保持稳定。

The drone uses an imu to maintain stability during flight.

无人机使用惯性测量单元来保持飞行稳定。

The drone uses a gyro to maintain stability during flight.

无人机使用陀螺仪来保持飞行中的稳定性。

If possible, stand up for your bout- that's what they do in professional armwrestling competitions.Put one foot forward- to maintain stability, and spread our weight.

如果可能的话，站起来参加比赛，在专业的扳手腕竞技活动中，选手们就是这样做的。双脚一前一后来保持平衡，分散全身重量。