On land, the supportive buoyancy of water is missing, the plant is no longer bathed in a nutrient solution, and air tends to dry things out.

在陆地上，水的浮力支持消失了，植物不再浸泡在营养液中，空气会使植物变干。

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Yet, once your sweat starts to dry, you can get chilled. The solution?

然而，一旦你的汗水开始变干，你会感觉到冷，如何解决呢？

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They then repeatedly dipped cotton threads, 1.5mm in diameter, into the solution, letting them dry between each dip.

他们将直径为1.5毫米的棉线浸入溶液里，然后将棉线拿出来，等棉线干了再次将它们浸入溶液，如此反复。

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Even though conventional vaccines are transported as dry powder rather than in solution, they still need to be dissolved in water before injection.

ECONOMIST: Vaccines