He said, " The planet is already at its hottest and least stable point in 125,000 years" .

" 地球已经处于12。5万年来最热、最不稳定的时刻。"

He probably used a type of disk that could measure degrees and had a little pointer to mark the angles of streets in relation to a stable point, usually North.

他可能使用了一种可以测量度数的圆盘，并有一个小指针来标记街道与一个稳定点的角度，通常是北方。

Another issue here is that we'd also expectthat the transitioning system will just generally work less wellthan either the stable starting point or the stable end point.

这里的另一个问题是，我们还预计过渡系统通常会比稳定的起点或稳定的终点运行得更差。

Let's go back to some of those core concepts, the stable reference points around which we've been organizing and orchestrating our understanding of world history for hundreds of years.

让我们回到其中一些核心概念，这些是我们数百年来一直围绕着它们组织和协调我们对世界历史的理解的稳定参考点。