Shifting rain patterns flood some regions and dry up others as nature demonstrates a grave physics lesson: Hot air holds more water molecules than cold.

降雨模式的改变导致一些地方洪水泛滥，一些地方又闹起了旱灾，所有这些都告诉我们这样一个物理规律：热空气中水分子数量比冷空气中水分子数量要多。

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Spring may be just around the corner in this poor part of Helsinki known as the Deep East, but the ground is still mostly snow-covered and the air has a dry, cold bite.

在赫尔辛基（芬兰首都），春天临近了，但地面上还是覆盖着积雪，空气又干又冷。

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According to a study from researchers at Mount Sinai Medical School, the flu virus is more stable and able to stay airborne longer when the air is cold and dry.

按Mount Sinai医学院研究者一研究，当空气寒冷和干燥流感病毒更稳定并能在空气中停留更久。

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Grit can get trapped in the mushrooms' nooks and crannies, so give them a swish in a bowl of cold water, then repeat with fresh water until the water runs clean and let them air dry in a single layer on kitchen towels.

WSJ: Stuffed Morels | Consider This