...；氢氧同位素；14C年龄；水文地质；分布特征；银川平原 [gap=1948]Keywords : confined water; hydrogen and oxygen isotopes; 14C age; hydrogeology;distribution characteristics; Yinchuan Plain..
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By measuring the proportion of heavier hydrogen and oxygen isotopes along a strand of hair, scientists can construct a geographic timeline.
通过测量一束头发上较重的氢和氧同位素的比例，科学家可以构建一个地理时间轴。
S. By measuring the proportion of heavier hydrogen and oxygen isotopes along a strand of hair, scientists can construct a geographic timeline.
通过测量一缕头发中较重的氢氧同位素的比例，科学家们可以构建一个地理学的时间轴。
The technique works because when water evaporates at sea, a combination of hydrogen and oxygen isotopes rise to form a cloud, which then releases rain when it moves inland.
这项技术很有效，因为当水从海里蒸发，氢和氧的同位素组合升空形成云，接着飘至陆地上空降雨。
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