如果你知道M是什么，是物体的质量，半径，知道C1值或者，媒介的C2值，然后你，就能算出终极速度。
If you know what m is, the mass of an object, the radius, and you know the values for C1 or C2 of that medium in which you move it, then you can calculate what the terminal velocity is.
选择适当的指导性策略和学习媒介(教室，自己掌握速度的基于网络的学习，网络会议，等等)。
Select appropriate instructional strategies and learning media (classroom, self-paced Web-based training, Web conferencing, and so on).
如果物体通过媒介-，比如说空气或者液体-，都会遇到阻力，阻力总是和速度相反。
If an object moves through a medium — - air or a liquid — there is a resistive force which always opposes the velocity.
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