spread blade

基本解释

The diseased tissue spread quickly under higher humidity, that ultimately led to collapse of the whole leaf blade.
在潮湿情况下病痕扩展迅速，以致全叶软腐塌萎。
With the wide use of Horizontal-axis wind turbine, the design of blade shape and the research of aerodynamic characteristics have been attracting wide-spread attention.
随着大型水平轴风力机的广泛使用，叶片的外形设计和气动性能研究受到广泛的关注。
The 300 holes in each blade, most of them thinner than a human hair, are engineered to spread a coat of cool air over the spinning blades so they aren't melted by 3,000F exhaust gases.
每一个涡轮机叶上有300个小孔，这些小孔大多数比人的头发丝还要细，它们会被一层冷却空气所覆盖，以免被3000F的高温所融化。