The first step uses a bit of influenza DNA to get the patient's immune system to begin fighting off the flu, and then the protection is given a "boost" some time later by the second step, which can be either another bit of DNA or a conventional flu vaccine.

VOA: standard.2010.07.21

And when it falls back down that energy is given off.

当它回去的时候,它的能量也消耗殆尽了。

麻省理工公开课 - 固态化学导论课程节选

And it is given off in the form of a photon.

它一个光能的形式释放。

麻省理工公开课 - 固态化学导论课程节选