这两种蛋白质存在于所有神经细胞之中，并能控制在神经间传递信息的化学物质神经传递素的释放。
These proteins are found in every nerve cell and control the release of the chemicals which neurons use to talk to each other, called neurotransmitters.
神经传递素是一种在神经细胞间传递信号的化学物质，在ADHD患者中，这种化学物质常常是指多巴胺，该物质的作用是调节愉悦和满足感。
A neurotransmitter is a chemical that carries messages between nerve cells and, in the case of ADHD, that chemical is often dopamine, which controls feelings of reward and pleasure.
比方说，它分泌大量能在细胞间传递化学信号的细胞因子，分子。
For example, it secretes larger amounts of cytokines, molecules that carry chemical signals between cells.
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