| 1. | Annual mean sunspot numbers 1900 - 2002
1900年至2002年的太阳黑子年平均数 |
| 2. | Wolf number , relative sunspot number
沃尔夫数 |
| 3. | Relative sunspot number
相对日斑数 |
| 4. | A solar cycle also called a sunspot cycle is an approximately 11 - year period with increasing and decreasing sunspot numbers
太阳周期是指大约十一年周期性的太阳黑子数量增加和减少。 |
| 5. | The recent increase in sunspot number offers a hint of the coming solar maximum of its 11 - year cycle
近期太阳黑子的数目正在不断增加，对即将发生的11年周期太阳最活跃期发出一个启示。 |
| 6. | A solar cycle ( also called a sunspot cycle ) is an approximately 11 - year period with increasing and decreasing sunspot numbers
太阳周期是指大约十一年周期性的太阳黑子数量增加和减少。 |
| 7. | The number and strength of energetic eruptions on the solar surface peak every 11 years , in phase with the sunspot number
和黑子周期同步，每隔十一年，太阳表面的爆发活动，无论强度和数目都会达到高峰。 |
| 8. | Moreover , the expected sunspot number will be a bit lower than the last two maxima in 1989 and 1978 , but still can be classified as above average
而且预期太阳黑子的数目会较前两次极大值1989和1978年略少，但仍高于平均数值。 |
| 9. | Since sunspot number is closely related to solar activities like flares and coronal mass ejection , the sun might have entered a low - activity state for a rather long period of time during these minimums
由于太阳黑子数目与如耀斑和日冕抛射等太阳活动关系密切，在上述太阳黑子极小期内，太阳的活动可能沉寂了一段长时间。 |
| 10. | More recently , david hathaway , a solar physicist at the marshall space flight center nasa and his colleagues predict the peak of solar activity will take place around the middle of the year 2000 . their prediction is based on the recent sunspot number and geomagnetic activity
最近，美国太空总署马歇尔飞行中心的太阳物理学家大伟哈法威及其同事根据太阳黑子的数目和地磁活动，预测太阳活动在2000年中会到达高峰期。 |
