1. The astronomers observed a large sunspot on the surface of the sun.
天文学家观察到太阳表面上的一个大黑子。

2. Sunspots are areas of intense magnetic activity on the sun.
太阳黑子是太阳上磁活动强烈的区域。

3. Scientists study sunspots to better understand the sun's magnetic field.
科学家研究太阳黑子以更好地理解太阳的磁场。

4. The number of sunspots on the sun varies in a cycle that lasts about 11 years.
太阳表面上的黑子数量以大约11年为周期变化。

5. Sunspots can affect communication systems on Earth by disrupting radio signals.
太阳黑子可以通过干扰无线电信号来影响地球上的通信系统。

6. Some people believe that sunspots have an influence on the Earth's climate.
有些人认为太阳黑子对地球的气候有影响。