involutions

1.【数】乘方

2.【生】退化;内转

3.【医】萎缩,退化,复旧

4.卷入,纠缠;错综复杂

5.复杂的句型

1.an act of making something complicated or intricate, or the condition of being complicated or intricate

2.an involute part or structure

3.a decline or degeneration in the physiological function of an organ

4.a return to normal size of a body or body part after expansion

5.the algebraic operation of raising a number, variable, or expression to a specified positive integral power, x.

6.a complicated grammatical construction

7.the process by which some cells grow inward over the edge of an organ or part until they rejoin the structure to form a tube.