不同沉积层中保存的壳有不同的含量比例，显示出更新代海洋温度的变化。
Different ratios in the shells preserved in various layers of sediment reveal the temperature changes in the oceans during the Pleistocene epoch.
你还记得在你父母那一代的温度计中使用的水银元素吗?
Do you remember that the element mercury was used in the thermometers of your parents' generation?
虽然在过去的30年间阿森松岛上的温度并没有明显变化，但该岛上风向的洋面温度在上世纪80年代跃升了1度以上，在那之后洋面温度趋于稳定。
Although the temperature on Ascension has not changed appreciably in the past 30 years, sea-surface temperatures upwind of it jumped by more than a degree in the 1980s before levelling off.
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