As each year's snow accumulation lay on the surface, evaporation and melting caused the snowflakes slowly to lose their feathery points and become tiny grains of ice.

由于每年的雪花积累在表面之上，蒸发和融化使得雪花慢慢失去其羽状尖端而变成微小的冰粒。

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Jon Nelson, of Ritsumeikan University, in Japan, has calculated that the most important property involved is the surface tension of the tiny clusters of water molecules from which snowflakes form.

日本立命馆大学的琼。尼尔森已经通过计算得出，其中最重要的特性是在雪花形成过程中一小部分水分子的表面张力。

youdao

Jon Nelson, of Ritsumeikan University, in Japan, has calculated that the most important property involved is the surface tension of the tiny clusters of water molecules from which snowflakes form.

ECONOMIST: Atmospheric science