太阳活动的盛衰以11年为一个周期，在一个周期内，太阳放射的紫外线的变化幅度要比其放射的能量的变化幅度要大得多。
The sun's activity waxes and wanes on an 11-year cycle, and over this cycle the amount of ultraviolet light the sun emits changes a lot more than does the total amount of energy.
使用不同恒温条件，发现以一年为周期的缓慢变化，幅度可达500微伽。
Different ways of stabilizing the outside temperature were employed. A slow periodic annual variation of its readings was observed with amplitude of about 500 microgals.
太阳活动的盛衰以11年为一个周期，在一个周期内，太阳放射的紫外线的变化幅度要比其放射的能量的变化幅度要大得多。
The sun's activity waxes and wanes on an 11-year cycle, and over this cycle the amount of ultraviolet (UV) light the sun emits changes a lot more than does the total amount of energy.
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