"分子间相互作用" can be translated into English as "intermolecular interactions" or "intermolecular forces" (when specifically referring to the forces between molecules).
Intermolecular interactions is a more general term that encompasses all types of interactions between molecules, including attractive and repulsive forces, hydrogen bonding, van der Waals forces, etc.
Intermolecular forces is a more specific term that often refers to the attractive or repulsive forces between molecules that influence their physical properties and behavior.
In most contexts, especially in chemistry and physics, both terms can be used interchangeably, but "intermolecular interactions" might be preferred when discussing a broader range of phenomena or when emphasizing the overall nature of the interactions.