| Subject | English | Russian |
| math. | averaging theory | теория усреднения (averaging theory provides links between the solutions of an "original" ordinary differential equation and its averaging counterpart) |
| math. | averaging theory provides links between the solutions of ... and ... | теория усреднения обеспечивает связь между решениями ... и ... (averaging theory provides links between the solutions of an "original" ordinary differential equation and its averaging counterpart) |
| math. | the averaging theory provides links between the solutions of an "original" ordinary differential equation and its averaging counterpart | первоначальное обыкновенное дифференциальное уравнение |
| math. | the various averaging and homogenization theorems make up an important part of the theory of differential equations | составлять важную часть (чего-то) |