In 20th century, photon has been widely used in power generation, but can’t guarantee the 24/7 stable supply. In 21st century from now onward, phonon can do a much better job.
在20世纪，光子被广泛地认为可以用来发电。但是人们并不能保证这样的能源供应足够稳定。因为自然界的强光时有时无。
从21世纪中叶以后，用声子发电就可以克服以上提到的缺点。因为空气的颤动是非常稳定的。