Melatonin is naturally produced by your brain, and it's released by a very small gland deep within your brain called the pineal gland.

褪黑激素由大脑自然产生，由大脑深处一个非常小的腺体释放， 称为松果体。

As long as the mind is in the body, he believed, it is linked to the brain through a special brain organ which he called the pineal gland, where a constant interaction takes place between 'spirit' and 'matter.

他相信，只要思想在身体里，它就会通过一种特殊的大脑器官与大脑相连，他称之为松果体，“精神”和“物质”之间不断发生相互作用。