To fall suddenly and hard.

猛跌；坠。

To roll about.

转动；滚来滚去。

To execute gymnastic feats, such as springs, somersaults, etc.

翻斛斗；打滚。

To move in a disorderly fashion.

踉跄而行。

To understand; become aware.

【口】了解；警觉。

To cause to fall; bring down.

打倒；弄倒。

To turn over and over.

滚落；辗转。

To rumple; disorder.

使不齐整；使混乱。

A fall.

跌。

A rolling over.

滚动。

A state of confusion.

混乱。

Interested response.

理会；有利之反应。