The only constraint is the mutual attraction between the molecules.
唯一的约束就是分子之间的相互吸引力.
辞典例句
Both sides feel by the opposite party deeply mutual attraction.
双方都感觉到被对方深深地相互吸引.
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The mutual attraction reflects positive factors too.
相互的吸引也反映了两国关系中的积极因素.
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Mutual attraction or sympathy; rapport.
相互吸引或意气相投; 融洽关系.
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