From there, the postganglionic fibers are super short — just long enough to communicate with their effector.

从那里，节后神经纤维超短——刚好足够长以与它们的效应器交流。

This one's called norepinephrine. And it is always norepinephrine that's released from postganglionic fibers in the sympathetic nervous system.

这个叫做去甲肾上腺素。交感神经系统节后纤维释放的永远是去甲肾上腺素。

So, that acetylcholine crosses the synapse and, if there's enough of it, it can stimulate action potentials in several neurons on the other end — in the postganglionic fibers.

乙酰胆碱穿过突触，如果有足够的乙酰胆碱，它可以刺激另一端的几个神经元的动作电位——在节后纤维中。