因为如果是那样的话，阳光将会被转换成大量的碳、氧原子保存到石灰岩中的碳酸钙里，而事实却是，岩层的同位素组成（Isotopic composition）中没有留下任何蛛丝马迹。
They would leave subtle clues in the isotopic composition of the limestone by shifting the ratios of light to heavy carbon and oxygen atoms in its calcium carbonate.
概述了钙同位素分馏机理、分析测定以及在环境地球化学研究中的应用。
Fractionation mechanism, analytical method and its applications in environmental geochemistry of calcium isotopes are summarized in this paper.
利用放射性同位素示踪技术研究荔枝果皮对外源钙和蔗糖的吸收及细胞壁构建规律。
Absorption of exogenous calcium and sucrose and their deposit onto the cell walls in litchi pericarp were studied by using radioisotope tracer technique.
文章在充分了解地质背景的前提下，对冰凌山钙华的水化学、碳氧同位素和稀土元素作了研究分析，从而取得以下成果。
In premise of full understanding geologic background, the analysis of hydrochemistry, carbon-oxygen isotope and rare earth element (REE) were made, then the results yielded as follow.
第一样品透过核反应涉及融合的一个同位素锎，249酸钙，其中氧，18澳。
The first samples were made through a nuclear reaction involving fusion of an isotope of californium, 249 Cf, with one of oxygen, 18 o.
第一样品透过核反应涉及融合的一个同位素锎，249酸钙，其中氧，18澳。
The first samples were made through a nuclear reaction involving fusion of an isotope of californium, 249 Cf, with one of oxygen, 18 o.
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