一是巨洪一般发生在太阳活动的峰年或谷年；

Thefirst is that Megalo-floods generally occur in the peak years and valley years of the solar activity.

youdao

一是巨洪一般发生在太阳活动的峰年或谷年；

Thefirst is that Megalo-floods generally occur in the peak years and valley years of the solar activity.

youdao