Clouds are formed by the condensation of water vapour in the atmosphere around clusters of molecules such as ammonia and sulphuric acid.

通过大气层中水蒸气的冷凝作用形成了云，凝结在成簇的氨分子和硫酸分子周围。

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In the massive eclogites, the garnets with low dislocation density and with no visible clusters of water molecules are mainly rigid although a few dislocation nets have been observed.

块状榴辉岩中石榴石的位错密度低，没有观察到水分子团，虽然在局部发现有位错网，但总体上仍呈刚性。

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And clusters of water molecules within garnet are very important evidence of the existence of fluid during ultra-high pressure metamorphic process.

而石榴石中的水分子团为超高压变质过程中有流体存在提供了有力的证据。

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Instead, the team found, they tend to clump together in bigger clusters of molecules - and then as even bigger lumps composed of these clusters.

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