其中大部分用来维持突触，让大脑即使在无事可做时也保持警觉。突触是神经细胞间的连结，脉冲信号通过它们在细胞间传导。
Most of this energy goes towards maintaining synapses, the junctions across which impulses jump from nerve cell to nerve cell, keeping the brain alert even when it is not doing anything.
其中大部分用来维持突触，让大脑即使在无事可做时也保持警觉。 突触是神经细胞间的连结，脉冲信号通过它们在细胞间传导。
Most of this energy goes towards maintaining synapses, the junctions across which impulses jump from nerve cell to nerve cell, keeping the brain alert even when it is not doing anything.
从长远来看，为了维持其经常项目逆差，美国将会付出更大的代价，这是熊市来临的信号。
In the long run, this could mean that Americans would have to pay more to finance their current-account deficit-a bearish sign.
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