He says the surprise collision clearly justifies the need for programs that search the skies for small space objects that could threaten earth.

VOA: special.2009.08.25

If we think of the size of a typical atom, we would say that would be about 10 to the negative 10 meters. So, we can see the diameter of a nucleus is absolutely smaller really concentrating that mass into a very small space.

一个普通细胞的大小，抱歉，我和细胞核搞混了0,如果我们考虑，一个普通原子的大小,这大概是10的负十次方米,所以原子核的直径确实非常小,真的是把质量。

麻省理工公开课 - 化学原理课程节选

Research in a small space is necessary for the clouded leopard.

VOA: special.2010.06.22

And next year, the country is launching a small space lab to practice docking in orbit - an essential part of manned missions to the Moon and Mars.

VOA: standard.2010.04.21

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

This French artist uses small colorful squares of glass to make an image of a space creature.

VOA: special.2009.04.08

And the team at Goddard Space Flight Center was testing extremely small amounts of material.

VOA: special.2009.09.30

The space station has been hit in the past by very small debris.

VOA: special.2009.04.01

The houses are small because of limited space on the South Lawn.

VOA: special.2009.12.22

Since the space was small and climate-controlled, staffers allowed only small groups in for a few minutes at a time, which was enough to cure most people's olfactory curiosity.

VOA: standard.2010.07.30