The act of folding or coiling in or round; also, that which folds in or round.

内卷；回旋(又指内卷或回旋之物)。

That which is complicated.

错综复杂。

The process of raising a mathematical quantity to a given power by multiplying it by itself.

【数】自乘方。

Retrograde change, the reverse of evolution, degeneration.

【生物】退化；衰退。

The return of an organ to its normal size after distention, as of the womb after childbirth.

【医】(器官)退缩(如产后子宫收缩)。