I hadn't realized it was based on concrete measurements of what the paleoclimates -- the ancient climates -- were, as recorded in the ice sheets, as recorded in deep ocean sediments, as recorded in lake sediments, tree rings, and a lot of other ways of measuring temperature.
我曾没有没意识到它是基于坚实的 历史气候测量数据--古代的气候-- 这些数据记录在冰原里，记录在深海沉积岩里， 记录在湖底沉积岩里，树木年轮里， 还有很多其他的温度测量方法里。