纸飞机在空中盘旋着落下。

The paper airplane was ___spiraling down through the air.

随着物价飞涨，许多家庭的开支开始失控地增加。

With prices rising sharply, many families' expenses are ___spiraling out of control.

由于经济危机，公司的利润正在急剧下降。

Due to the economic crisis, the company's profits are ___spiraling downward rapidly.