| 1. | We observe three sunspot groups on the disc .
在日面上观测到三个黑子群。 |
| 2. | These faculae frequently are the forerunners of sunspot formation .
这些光斑常常是形成太阳黑子的先兆。 |
| 3. | Large sunspots can comfortably be seen through field glasses .
大的太阳黑子用双筒望远镜就能看得很清楚。 |
| 4. | This includes the continuous survey of umbra and penumbra of the sunspot .
这包括对太阳黑子本影和半影持续的观测。 |
| 5. | Approximately every 11 years the number of visible sunspots reaches a maximum .
大约每11年，可看到的太阳黑子数目达到一个峰值。 |
| 6. | In summary there are the following possibilities for the observation of sunspots .
总而言之，对太阳黑子的观测存在着下列可能性。 |
| 7. | In view of its physical nature such a sunspot group actually has a structure of its own .
从物理性质方面来看黑子群实际上有它自身的结构。 |
| 8. | We might add a remark about the derivation of the epochs of the sunspot minima and maxima .
我们不妨谈谈有关太阳黑子极小和极大期的推导。 |
| 9. | To follow these movements of sunspots is worthwhile for every solar observer .
任何一个太阳观测者值得花时间和精力去跟踪观测太阳黑子的这种移动。 |
| 10. | The nuclei of larger sunspots sometimes undergo disintegration or splitting into several parts .
较大太阳黑子的核心有时会瓦解或分裂成好几个部分。 |
