经过十多年的努力，研究了2万个电子显微镜下蛔虫的解剖结构横截面，怀特博士精准计算出了302个神经元是怎样连接起来的。

After more than a decade's labor, which required examining 20, 000 electron microscope cross sections of the worm's anatomy, Dr. White worked out exactly how the 302 neurons were interconnected.

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经过十多年的努力，研究了2万个电子显微镜下蛔虫的解剖结构横截面，怀特博士精准计算出了302个神经元是怎样连接起来的。

After more than a decade's labor, which required examining 20,000 electron microscope cross sections of the worm's anatomy, Dr. White worked out exactly how the 302 neurons were interconnected.

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同样从13世纪开始，经过精密计算，绘制的地图更为精准，加上航海日志，使航行变得可靠而准确。

Also beginning in the thirteenth century, there were new maps refined by precise calculations and the reports of sailors that made it possible to trace one's path with reasonable accuracy.

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