1·Their prediction is based on levels of rare isotopes that accumulate in the Earth"s crust when weak solar winds allow cosmic rays to penetrate the Earth"s atmosphere.
他们的预测是基于积聚在地壳的罕见同位素的水平，轻微的太阳风使宇宙射线穿透地球的大气层。
2·Li C Y. Yuan H Q. Yang L S Measurements of the mechanical and electromagnetic properties of rare earth giant magnetostriction materials.
袁惠群。李成英。周卓稀土超磁致伸缩材料应力与电磁耦合特性的实验研究。
3·There is some effort to reopen rare earth mines in the U. S but I don't know how viable they can be for the long run and even with them China's a hard supplier to replace.
美国的确有些稀土矿重开的努力，但我不知道他们是否能够长期开采，即便有他们，中国也是一个很难替代的供应者。
4·S. has lost the necessary rare earth material refining capacity, and rebuilding the supply chain may take up to 15 rs.
此外，美国还失去了必要的稀土材料精炼能力，重建供应链最长可能需要15年的时间。
5·Synthesis, Characterization and Fluorescence Properties of Rare Earth with p-Chloro-benzoic Acid and 2,4,6-Tris-(2-pyridyl)-s-triazine.
对氯苯甲酸-2，4，6-三吡啶基三嗪稀土配合物的合成、表征及发光性能。