The femoral nerve is divided into several dozen separate bundles of nerves, called fascicles, each of which contains hundreds if not thousands of individual nerves.

股骨神经分为一些单独的神经束，每一个神经束都包含了不是数千就是数百根单独的神经。

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Tobacco smoke contains thousands of different chemicals which are released into the air.

烟雾包含几千种不同的化学物质，它们被释放在空气中。

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This band also contains several layers of a mineral called glauconite, each of which would have taken tens of thousands of years to form.

ECONOMIST: Some new ideas about why life on Earth has periodic crises