| 1. | Plasma in space are collision free .
空间中等离子体是无碰撞的。 |
| 2. | A junction has no definite direction in space .
接头在空间中没有一定方向。 |
| 3. | Other galaxies are placed irregularly in space .
其它星系不规则地位于太空中。 |
| 4. | It became the first reusable vehicle in space .
它成为第一个能重复使用的宇宙交通工具。 |
| 5. | The secondary valence is directed toward fixed positions in space .
副介指向空间的确定位置。 |
| 6. | Our scientists are leading the way in space research .
我们的科学家在宇宙探索中处于领先地位。 |
| 7. | The discovery marks a great advance in space technology .
这项发现标志着空间技术向前迈进了一大步。 |
| 8. | It proved that winged vehicle could exist alone in space .
它证明了有翼飞行器能够单独在太空中飞行。 |
| 9. | Normally a point in space is identified by means of coordinates .
空间中的点通常是依靠座标来定位的。 |
| 10. | One of his feet was on the wooden floor, the other was in space .
他的一只脚踩在地板上，另一只脚悬空。 |
