The most remarkable development of the last quarter of the twentieth century has been the revelation of enormous weaknesses at the core of the world's seemingly strong dictatorships.
悲伤就像海洋；它如潮水般起伏。有时水面平静，有时却势不可挡。我们所能做的就是学会游泳。
The energy transition presents enormous economic opportunities if we get it right.
The past is always tense, the future perfect.