The movement of multi-rigid-body system interconnected by smooth hinge moving in space and plane are deeply studied with the discrete time transfer matrix method of multibody system.

深入探讨多体系统离散时间传递矩阵法对平面、间刚体光滑铰多体系统运动响应的研究。

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We are usually tired already by the time we get on a plane, and the crowded space and unstable internet connection make work more challenging.

当我们上飞机的时候，通常已经很累了，而拥挤的空间和不稳定的网络使工作更具挑战性。

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Flux looks quite different in the plane and in space because, in the plane, it is just another kind of line integral, while in space it is a surface integral.

平面中的通量和空间中的通量有很大区别，在平面中，通量仅仅是线积分的另一种形式，而在空间中，它表现为曲面积分。

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There were new designs for the plane's rocket engine, landing equipment and the small rockets needed to move it in space.

VOA: special.2010.07.07

And so begins the first powered flight of the experimental plane designed to take man to the edge of space.

VOA: special.2010.07.07

The Smithsonian's National Air and Space Museum in Washington,D.C.owns the plane.

VOA: special.2009.03.18

The Clementine II, Kinetic-Kill Anti-Satellite and Military Space Plane programs are the technological seed corn for such crucial capabilities as space-based missile defenses, neutralizing enemy satellites and having prompt, reliable and inexpensive access to and use of space.

CENTERFORSECURITYPOLICY: AN OPEN LETTER TO PRESIDENT CLINTON

The programs in question are the Clementine II asteroid intercept experiment, the Army's Kinetic Kill Anti-Satellite Weapon and the Military Space Plane.

CENTERFORSECURITYPOLICY: Clinton Policies Would Disarm U.S. Space Capabilit

The agency has already spent billions of dollars on the National Aerospace Plane, the X-33, X-34, X-37, X-38 and the Orbital Space Plane.

FORBES: Magazine Article