a sudden sharp decrease in some quantity; "a drop of 57 points on the Dow Jones index"; "there was a drop in pressure in the pulmonary artery"; "a dip in prices"; "when that became known the price of their stock went into free fall" 同义词：drop, dip, fall,
the ideal falling motion of something subject only to a gravitational field
In Newtonian physics, free fall is any motion of a body where its weight is the only force acting upon it. In the context of General Relativity where gravitation is reduced to a space-time curvature, a body in free fall has no force acting on it and it moves along a geodesic.
例句与用法
1.
Chute gave out , free fall three thousand feet , 没有降落伞了我从三千英尺高的地方摔了下来
2.
Chute gave out , free fall three thousand feet , 没有降落伞了我从三千英尺高的地方摔了下来
3.
The fed might try to prevent a free fall in the dollar ' s price by driving interest rates still higher 美联储为防止美元价格的急剧下滑，或许会进一步提高利率。
4.
Interchangeable single - chamber silos free fall for use with lift - off and dumper vehicles - connecting dimensions and requirements 开启式卸料车和翻斗式卸料车用的可互换的单腔筒仓
5.
In late september figures showed that the american housing market was in free fall , with both sales and prices plunging 9月底公布的数字表明美国房屋市场是在直跌，房屋销售及房价指标都在下跌。
6.
Optics and optical instruments - environmental test methods - part 13 : combined shock , bump or free fall and dry heat or cold iso 9022 - 13 : 1998 光学和光学仪器.环境试验方法.第13部分:组合冲击碰
7.
During an air display show , a free falling parachute team suddenly disappears into thin air before a watching crown 电影‘偷尸贼的入侵’讲述在航空展? [会，当降落伞队在天空徐徐落下时，突然在观众前消失得无影无踪。
8.
Of mitsubishi , once one of the hottest car brands , in a free fall , the company ' s executives are trying to engineer a turnaround 三菱汽车过去在美国市场上是畅销品牌，现在180度大转弯，公司高管正为扭转困境绞尽脑汁。
9.
But newspapers , perhaps the ultimate trophy asset even as the industry appears to be in a free fall , may be too much even for previously successful business executives 但即使在报业业绩似乎直直落之际，报纸仍是最大奖的资产，对这些原来事业有成的执行长仍是极大的负担。
10.
In fact , if our sun suddenly became a black hole , the orbits of all the planets would not change at all . so what will happen if someone is free falling into a black hole 黑洞的可怕引力会随著距离递减，事实上假若我们的太阳突然变成一个黑洞，地球并不会感到太阳的引力有甚么不同，仍旧会依著同一轨道绕著太阳旋转。
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