求翻译：在反射活动中神经冲动必须经过反射弧的中枢部分。中枢神经元之间并无原生质相连，它们之间的信息传递主要靠神经元相接触的突触或缝隙连接来完成。因此，信息通过中枢内的传递已经不同于外周的传导，再加上神经元之间连接的方式复杂多样，因此，使反射活动具有与外周传导不同的许多特征：是什么意思？

Nerve impulses in the reflex activity must be a central part of the reflex arc. Central neurons are not protoplasm connected to the transmission of information between them depends mainly on the neurons in contact with the synapse, or gap junctions. Therefore, the information transfer hub is differe

In reflection activities must be nerve impulses in the central part of the reflex arc. Central nervous system and no plasm between $connected between them, the information is passed on in contact with neurons or crevice of the connection to complete. Therefore, the information passed through the hub

The nerve impulse must pass through the reflex arc main center part in the reflection activity.Between the main center neuron and does not have the plasma to be connected, between them the information transmission mainly depends on the synapse or the slit connection which the neuron contacts complet

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