We also sum up the installation environment of measuring the freevelocity.
最后还归纳了测量机器自由速度的安装条件。
2
A spaceship that reaches escape velocity is moving fast enough to break free of a planet's gravity.
太空船之所以能飞出地球，是因为其飞行速度很快，足以挣脱地球的引力。
3
Both the ratio of friction velocity to free stream wind velocity and the thickness of airflow are subject to the sidewall effect, showing the increase trend with the decreasing aspect ratios.