So turbines grew. And they can now span up to three hundred feet at the hub height, but they can't really go a lot higher, and more height is where the more wind is, and more power -- as much as twice as much.
所以涡轮那时在不断的被开发。现在他们可以跨越跨度长达三百英尺的枢纽高度， 但是他们确实在也不能比那再高了， 不过更高的地方有更多的风，以及更多的能量 -- 两倍高的能量。