By the time he passed four thousand feet he had reached terminalvelocity, the wind was a solid beating wall of sound against which he could move no faster.
With analysis of forces on particle and calculation of terminal velocities, terminalvelocity models are selected, and then Pulse jamming settlement theory was discussed.
在颗粒受力分析及沉降末速计算基础上，首先选取了沉降速度模型，进而对脉动干扰沉降理论做了初步探讨。
3
The falling object, after traveling a certain distance through the air reaches a final speed, or "terminalvelocity," because the object's friction with the air slows the fall.