鸟儿也不见了踪影，海鸥能娴熟地利用海浪来获取速度，没有海浪的话也就没有了炫技的机会。
Even birds were missing. Shearwaters, so adept at using waves to increase their speed, could not show off their expertise without a wave in sight.
它们在海面上奋力翱翔，借助海浪之力获取速度，忽而飞升到高空寻找食物。
They fly so excitingly, picking up speed from the waves, then cavorting exuberantly rather higher while looking for food.
每一个浮标最高可以产生高达40千瓦的电力，发电的多少依赖于海浪的高度以及速度，同样也依赖于海浪的波长以及海水的密度。
Depending on wave height and speed, as well as wavelength and water density, each buoy can produce up to 40 kilowatts of electricity.
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