These transmitter molecules cross the gap and bind to special receptors in the downstream nerve cell.

这种递质分子穿过间隙，会结合到下游神经细胞的特殊受体上。

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Then, after a 12-day gap in 1876—when Bell went to Washington to sort out patent questions about his work—he suddenly began trying another kind of voice transmitter.

之后在1876年，经过了12天的瓶颈后--当贝尔去华盛顿处理关于他工作上专利的问题时--他突然开始尝试另一种声音的传送器。

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Then, after a 12-day gap in 1876—when Bell went to Washington to sort out patent questions about his work—he suddenly began trying another kind of voice transmitter.

之后在1876年，经过了12天的瓶颈后--当贝尔去华盛顿处理关于他工作上专利的问题时--他突然开始尝试另一种声音的传送器。

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