主风向

在一般总图上布置设施时，应考虑到主风向。

In the arrangement of the facilities on the general plot plan , the prevailing wind direction shall be taken into account .

烟雾本周开始消散，这一方面得益于主风向的改变带来了降雨，另一方面则得益于部署了两架俄罗斯BE-200消防飞机。

The smog started to clear this week thanks both to a change in prevailing winds , bringing rain , and the deployment of two Russian BE-200 fire-fighting aircraft .

近地表自然风在主风向与侧风向的二维风速信号均表现出很高的随机性。

There is highly randomicity in two dimensional wind speed signal .

与行状植物的排列方向和主风向夹角的平方根成正比。

It is proportional to the square root of the angle between vegetation alienation and wind direction .

耕作垄向与主风向互相垂直时，土壤风蚀通量最小；

When main wind directions and the ridge in a field cultivation is perpendicular each other , the flux of soil wind erosion is minimal ;

研究结果表明主风向风速的速度均值和方差较大，但平均湍流强度却小于侧向风的平均湍流强度；

The results show that : the average speed and speed variance in X direction ( main direction ) are quite large , but average turbulence intensity of wind speed in X direction is lower than that in Y direction ( side direction );

这道延伸数千米的地网既能在主害风向上阻沙，又能在次害风向上导沙。

This several thousand meter long ground net can not only resist the sand in the primary-harm wind direction but also guide the sand in the secondary-harm wind direction .