The results show that the reflection coefficient near the wall is about 0. 59, and in the plasma of the first discharge after a gas change, the wall-released isotope amount to 65% .

结果表明，等离子体在壁处的反射系数约为0.59，变换工作气体后，在第一次放电的等离子体中，由壁释放的同位素含量约占65％。

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Authigenic carbonate oxygen and carbon isotope evidence in lake sediment is an important proxy to reflect lake environment and climatic change.

湖泊自生碳酸盐碳氧同位素变化是反映内陆湖泊水环境与气候环境的重要指标。

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The carbon isotope shifts during Upper Permian in the South China drop gradually, and such phenomena may correspond to sea level change.

华南晚二叠世的碳同位素变化曲线是逐渐降低的，与全球海平面变化趋势相一致。

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