磁流体动力学对磁场和导电的液体或气体，诸如熔化的金属或者等离子区之间的相互作用的研究 The study of the interaction of magnetic fields and electrically conducting liquids or gases, such as molten metal or plasma.
（种间）相互作用出现在群落中的相互作用和效应，例如共生现象 Any of the reciprocal actions or effects, such as symbiosis, that can occur in a community.
但是，啊，我可能失去了多少，你们能看的人从戏剧表演中看动作，听语言的相互作用中产生了多少喜悦！ But, oh, how much I must miss, and how much pleasure you seeing ones can derive from watching and hearing the interplay of speech and movement in the unfolding of a dramatic performance!
系统间或一个系统的各种特性之间的相互作用。 Interaction between systems or between properties of a system.
