The parabola would controlair flow in a way that would lessen the shockwave, NASA says.
NASA表示，这一抛物线设计可以通过控制气流来减少冲击波的产生。
2
They're looking at how they can controlair flow just by changing the texture of a surface.
他们正在寻求仅通过改变表面纹理来控制气流的方法。
3
We will work hard to prevent and controlair pollution nationwide and increase the proportion of sewage treated and household refuse safely disposed of in key cities.