tractor beam

基本解释

Under appropriate conditions a [Bessel beam] can act as an ‘optical tractor beam,’” write physicist Jun Chen of Fudan University in Shanghai and colleagues.
在合适的条件下，贝塞尔光束可以作为一种光学牵引束。” 复旦大学物理学家陈俊（Jun Chen,音译）和他的同事们在文章中写到。
And Grier should know: he designed his own tractor beam and built it, demonstrating for the first time that a beam of light can tug objects over long distances.
因为他设计并制造了他自己的牵引光束装置，并且用他的装置第一次证明了光束可以远距离拖动物体。
You don't know where the bad guys are hiding, or where you go to reload your weapons, or what buttons you have to push to deactivate the tractor beam or whatever.
你不知道坏蛋藏在哪儿，不知道去哪装武器，不知道按哪个键关闭拖拉机射线或其它东西。

Andrews and the Institute of Scientific Instruments have developed a working (albeit quite miniature) tractor beam themselves.
FORBES: Scientists Build A Working Tractor Beam
We recently saw research that suggested negative radiation pressure in light could lead to a practical tractor beam.
ENGADGET: Researchers build a working tractor beam, on a very small scale
The main challenge to building a tractor beam is pretty intuitive.
FORBES: Scientists Build A Working Tractor Beam