Solar minimum
即使考虑了这一波动，TSI在前三次的太阳极小期中依然下降到相同的水平，然而在这次较长的极小期却不是这样子了。
Despite this variation, the TSI has dipped to the same level during the three previous solar minima. Not so during this recent elongated minimum.
youdao
应用推荐
模块上移
模块下移
不移动