峰年

dì zhèn huó dòng fēng nián

地震活动峰年

peak year of earthquake activity

nián qián hòu shì tài yáng huó dòng de fēng nián

1980年前后是太阳活动的峰年。

Around 1980 were peak years for solar activity.

fēng nián zēng fú míng xiǎn xià jiàng

峰年增幅明显下降。

The peak annual growth rate decreased significantly.