| 1. | If the meteoroids are bunched together, the number of meteors seen varies from year to year .
如果流星体聚集在一起，则每年看到的流星数都不一样。 |
| 2. | Many scientists believe that lunar craters were formed by the collision of meteors and comets against the moon .
许多科学家相信，月球坑穴是流星和彗星碰撞月球所造成的。 |
| 3. | Visual counting of meteors
目视观测计算流星雨的流星数目 |
| 4. | Estimated numbers of meteors per hour
流星数目每小时 |
| 5. | Photographing of meteors
流星的摄影观测 |
| 6. | The source of meteors traveling through space has yet to be explained satisfactorily
至于穿越太空的流星的来源，还有待于得出令人满意的解答。 |
| 7. | Each year , few hundreds of meteor emerge during the maxima which lasts an hour or two
。每年，这个流星雨在极大期的数小时内，都会出现一两百颗流星。 |
| 8. | However , the 1966 leonids meteor shower was a spectacular historic event that produced hundreds of thousands of meteor every hour
然而， 1966年的狮子座流星雨每小时产生的成千上万颗流星。 |
