Misconception phenomenon often appears In the process of having sports. This greatly interferes the athletes in making accurate judgement of the distance, height, speed and the direction of an action.

在体育运动过程中，经常会出现各种运动错觉现象，这对于运动员正确估计运动距离、高度、速度和动作方向，都会产生极大的心理影响。

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The X-15 set height and speed records greater than those expected.

VOA: special.2010.07.07

So，the point is,every object falling under gravity is given by the same formula, but there are many, many objects that can have many histories, all falling under gravity, and what's different from one object and the other object is, when was it dropped, from what height, and with what initial speed.

关键是,每一个受重力作用下落的物体,都有同样的表达式,但是各个受重力作用下落的物体,都有不同的初始条件,所以它们的区别在于,下落时刻,下落高度和初始速度

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The witness said he did not hear any irregular engine noise when the helicopter went past and the height and speed of the craft were normal.

BBC: Colin McRae's neighbour describes helicopter crash

Using the footage and the location of an impact into Lake Chebarkul, Jorge Zuluaga and Ignacio Ferrin, from the University of Antioquia in Medellin were able to use simple trigonometry to calculate the height, speed and position of the rock as it fell to Earth.

BBC: Russia meteor's origin tracked down

Although Raytheon would not give details of the height, speed and range of the UAVs, saying that data "sensitive", it did say that the Navy wanted tests to be as realistic as possible, suggesting that the aircraft were behaving in the way military planners would expect them to.

BBC: Anti-aircraft laser unveiled at Farnborough Airshow