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1 ?关系大调 , , 重句部份是 e 小调15,而诗节部份是它的关系大调 (relative major) :G 大调.不论重句.
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Theophylline, a close structural relative of caffeine and the major stimulant in tea, was one of the most effective compounds in both regards. 茶碱是咖啡因的近亲，也是茶中的主要兴奋剂，它在这两方面都是最有效的化合物之一。 - 2
The major difference is that Allende is depleted in the most volatile elements, like hydrogen, carbon, oxygen, nitrogen, and the noble gases, relative to the Sun. 主要的差别是，相比于太阳，阿连德陨石缺失了大部分的挥发性元素，例如氢、碳、氧、氮和稀有气体。 - 3
Some background: Most of the world's major currencies "float" against one another. That is, their relative values move up or down depending on market forces. 背景资料：大多数世界主要货币相互“浮动”，也就是说，这些货币的相对价值根据市场力量上下浮动。
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