So, if you stagger into the head late at night and you're so toilet-hugging sick that you forget to turn on the light, you may think that you're having a religious experience.  So, how does a living creature make light?
当某个晚上你跌撞的冲进厕所 难受的太厉害，恨不得抱着马桶大吐。 忘记了开灯， 那是你也许会觉得自己看到了神明下凡呢。 那么这些生物是怎么样发光的呢。