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来源:雅诚德英语网
When Stevenson followed the carbon-14 trail back in time, he found carbon-4 levels change with the intensity of solar burning.
当史蒂文森跟随碳-14的痕迹来追溯过去时,他发现碳-4的水平随着太阳燃烧的强度而变化。
When Stevenson followed the carbon-14 trail back in time, he found carbon-4 levels change with the intensity of solar burning.
当史蒂文森跟随碳-14的痕迹来追溯过去时,他发现碳-4的水平随着太阳燃烧的强度而变化。