Those ratios provide clues about the temperature and salinity of the water in which the corals were immersed, Watanabe says.
渡边刚表示,这些同位素比例为珊瑚生长环境的海水温度及盐度情况提供了线索。
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By analyzing ratios of isotopes — variations of the same element with a different mass - he can learn things about the environment they lived in, such as temperature and salinity.