Very little design time has to be spent on how to handle their mutual interactions.

So the idea of mutual interaction is not too convincing.

But all spiders experience a sense of mutual interaction that is inconceivable to human beings.

Today a range of doctrines find themselves either in conflict or without mutual interaction.

These relationships were a natural consequence of evolution working to produce mutual interactions from which all the species involved would benefit.

Since forces result from mutual interactions, the air must also be pushing the bird upwards.

Since forces result from mutual interactions, the road must also be pushing the wheels forward.

Upon contact with a human body, a kind of mutual interaction takes place that can't be described.

Additionally, the particles in this system are assumed to have negligible mutual interaction.

European educational policy must be developed in such a way that it supports the movement of Union citizens and their mutual interaction.