The line the centre of gravity has to follow is indeed very simple, and in most cases, he believed, straight.

重心应当因循的线路确实非常简单，而且在大多数情况下，他相信，（只）是（简单）直线。

youdao

Think of this as being a plumb line to find... used to find the direction of gravity.

假设这是铅垂。，想想重力方向是怎样的。

youdao

The reeling out of the drilling line is powered by gravity and reeling in by an electric motor or diesel engine.

松开钢丝绳是依靠重力的作用，而缠绕钢丝绳则是借助于电马达或柴油机。

youdao

This exploits one of the predictions of Einstein's general theory of relativity: that the path of a beam of light (which is a straight line in empty space) is bent inwards by the gravity of a massive object.

ECONOMIST: Cosmology: I spy with my little gravitational lens | The

If an object floating through space passes near the line of sight between the earth and a distant star, its gravity should, according to the theory of relativity, bend and focus the light from that star.

ECONOMIST: The dark side of cosmology

Along with a current line-up of more than 90 compatible games, including the five star No Gravity, Outfoxed, Silverfish, Temple Run, Super Crossfire HD, Air Attack HD and Terra Noctis, Gametel for iOS devices also supports iCADE's suite of classic retro games with over 100 titles available to download from the Apple iTunes App Store.

ENGADGET: Gametel Bluetooth mobile controller lands stateside for $49.99