The downward flow of a paint or powder that is applied too heavy or onto a hot surface.

油漆或粉末喷涂太厚或喷在预热的表面，从而使涂膜往下往下流动。

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This creates downward air currents. These downdrafts hit the surface of the planet, flow outward, and collide with each other, forming updrafts.

气流向下落在地球表面，向外流动，相互碰撞，如此一来就形成上升气流。

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In a typical software system, function calls flow downward from higher-level components to lower-level ones; whereas events percolate up in the opposite direction. Figure 1 illustrates this pattern.

在典型的软件系统中，函数的调用流是从较高级部分到低级部分进行的；而事件是以相反的方向过滤的，如Figure 1所示。

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"A number of participants expressed willingness to adjust the flow of purchases downward as early as the June meeting if the economic information received by that time showed evidence of sufficiently strong and sustained growth, " the minutes said.

BBC: US Fed's Ben Bernanke hails benefits of stimulus

As the craft moves forward, the flow of water over the curved side pulls the wing downward.

FORBES: Cruising Altitude: Minus 400 Feet