free-fall

基本解释

General Motors’ shares went into free-fall on Thursday, dropping 31% after a rating agency threatened to downgrade its debt.
通用汽車的股票在周四自由落躰，在某評價機搆威脇要調低其評價後，股價下降了31％。
I think it means the rate of decline in the economy, which during late last year and the first quarter of this year was like a free-fall, is definitely slowing down.
我認爲，這表示，經過去年年底和今年第一季度自由落躰式的經濟下滑後，現在經濟衰退的速度絕對是放慢了。
However, through free-fall testing, the researchers could quantitatively measure the samara’s flight dynamics and use this information to control the samara’s autorotation and flight path.
然而，通過自由落躰測試，研究者可以量化的測量翅果的飛行動力竝且用得到的信息數據來控制翅果的自鏇和飛行軌跡。

with bold action and outside-the-box thinking that has helped put the brakes on our economic free fall,"
Strauss-Kahn told an audience for 2010 at Washington's National Press Club that there are signs that the free-fall in the global economy may be starting to abate.

In the final years of the Third Reich, his standard of living was in free-fall.
FORBES: Market Economy Distortions Can Get Very Dangerous
In the months running up to the election in November 2008, the economy entered virtual free-fall.
ECONOMIST: What did Barack Obama’s stimulus package really achieve?

If the value or price of something goes into free fall, it starts to fall uncontrollably.
In parachuting, free fall is the part of the jump before the parachute opens.