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.

互联网

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.

互联网

Mutual attraction or sympathy; rapport.

相互吸引或意气相投; 融洽关系.

互联网