Some futurists envision nanotechnology also being used to explore the deep sea in small submarine, or even to launch finger-sized rockets packed with micro miniature instruments.

一些未来学家设想纳米技术也可以用于在小型潜水艇里探索深海，甚至可以用来发射装有微型仪器的手指大小的火箭。

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Objects, like bits of old space rockets or satellites, move around the planet at very high speeds, so fast that even a very small piece can break important satellites or become dangerous to astronauts.

一些物体，比如一些旧的太空火箭或卫星碎片，在地球上以非常高的速度运动，速度如此之快，以至于一个非常小的碎片都能破坏重要的卫星或对宇航员造成危险。

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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

One of the small rockets of his automatic control system stopped working.

VOA: special.2009.06.17

It would use one of several dependable military rockets to launch a small, one-man spacecraft.

VOA: special.2009.06.17

Lebanon's state news agency said the rockets were 107-millimeter Grad rockets, a type of small rocket Lebanese officials said have been fired before from south Lebanon into Israel.

WSJ: Rockets Hit Hezbollah Strongholds in Beirut

And if Ares is cancelled another winner may be SpaceX, a small Californian firm that is building a series of rockets called Falcon.

ECONOMIST: Human spaceflight: Over the moon? | The

But these rockets also have in them, I picked up today at the scene, you know, lots of small metal balls.

NPR: Haifa Adjusts as Hezbollah Rockets Rain Down