- 推荐网络例句
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Combination in the maintenance of skin whitening, the young can be said to have the effect of treasures.
两者的结合中，对维持皮肤美白、年轻可以说是有珍品的效果。
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Uide: This is the world-famous Forbidden City where once emperors, empresses and their families lived.
： 这就是举世闻名的紫禁城，曾经是帝王、后妃和他们亲族居住的地方。
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The persistence, existence, stability and global attractivity of periodic solutions of Lotka-Volterra systems are an important direction of mathematical ecology research. It has been an important topic to give a definite criterion of the properties of a complicated ecological system. Many ecologist and mathematician have paid much attention in this field.
生态系统的持久性、周期解的存在性及稳定性、全局吸引性等问题是数学生态学理论中的一个重要研究内容，对上述问题给出明确的判定准则是数学生态学的一个重要课题，历来受到生态学家与数学家的广泛重视。
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