求翻译：另一方面，冲动在反射弧的中枢部分传布时还可产生阻塞现象。例如，单独兴奋纤维A可引起9个突触后神经元兴奋，单独兴奋纤维B也可引起其他9个突触后神经元兴奋。由于纤维A和纤维B共同支配其中6个神经元,因此,当纤维A与纤维B兴奋时,只会有12个神经元而不是18个神经元发生兴奋。这个现象叫做阻塞。由此可知，在反射活动中，可由于中枢的易化而使反射活动加强，也可由于中枢的阻塞而使反射活动减弱。是什么意思？

On the other hand, the impulse in the central part of the spread of the reflex arc can produce obstruction. For example, a separate excited fiber a cause 9 postsynaptic neuronal excitability, a separate excited fiber b may also cause the other nine postsynaptic neuronal excitability. As the fiber a

On the one hand, impulse in the brain of reflex arc spreads can also produce when blocking. For example, individual fibers excited A can cause 9 neurons after the exciting, exciting fiber B can also arise from other 9 neurons After the excitement. Because Fiber and fiber B A common dominant 6 of the

Also on the other hand, impulse disseminates when the reflex arc main center part may have the blocking phenomenon.For example, after alone excited textile fiber A may cause 9 synapses the neuron to be excited, after alone excited textile fiber B also may cause other 9 synapses the neuron to be exci

The other hand, the impulse in the central part of the dissemination of the reflex arc can also occur when blocking. For example, separate excitatory fibers can cause a 9 postsynaptic neurons, separately excited fiber b can also be caused by other 9 postsynaptic neurons. Due to fiber and fiber b dom

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