63 The Miller’s Problem

Records show that the windmill was first used in A.D. 644. From there it spread all over the world. It was used to grind grain. It was used to pump water. It was used to generate power. And the windmill was used to saw lumber. The windmill looked like a tower with four arms. The arms were good for turning the mill. The arms were good for pumping water. The arms were good for sawing lumber.

The windmill had four blades. The blades were made of wood. The blades were covered with cloth. The blades were turned by the wind. The blades were turned by the air. The blades were turned by the breeze. The blades were turned by the gust. The blades were turned by the gale. The blades were turned by the storm. The blades were turned by the hurricane. The blades were turned by the tornado. The blades were turned by the cyclone. The blades were turned by the typhoon. The blades were turned by the monsoon. The blades were turned by the squall. The blades were turned by the blast. The blades were turned by the puff. The blades were turned by the breath.

記錄顯示風車最早在西元 644 年使用，之後傳遍世界。它被用來磨穀物、抽水、發電，甚至鋸木材。風車看起來像一座有四個臂的塔，這些臂非常適合轉動磨坊、抽水和鋸木。

風車有四片葉片，葉片由木頭製成並覆蓋布料。葉片由風轉動，也會因空氣、微風、陣風、強風、暴風、颶風、龍捲風、氣旋、颱風、季風、狂風、爆風、氣流等而轉動。