因此，我们的身体不断地把旧物质替换成新的，就像一个喷泉，或多或少地保持着它的形式和运动，但其中的水分子总是不同的。

Thus our bodies continuously exchange old substance for new, just like a spring which more or less maintains its form and movement, but in which the water molecules are always different.

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矿物质、藻类和蓝菌为内华达州黑岩沙漠的间歇喷泉披上华美绚丽的外衣。

Minerals, algae, and cyanobacteria give this geyser in Nevada's Black Rock Desert its brilliant colors.

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