Airflows create not just towers and hills, but also some breaches and abysses.

气流不仅仅创造了云塔和斜坡，同样导致了缺口。

Based on the CFD method, 3d numerical calculation was used to simulate the airflows at different blow angles in the air-conditioned office.

采用CFD方法对空调办公室内不同送风角度下气流组织进行三维数值模拟计算。

It is useful where traditional smoke detection technologies are impractical, such as large open areas and rooms with high ceilings and high airflows.

它还能在传统烟雾探测技术无法使用的场所发挥作用，如大型露天场地和有着很高的天花板和强气流的房间。