以下为句子列表：
英文: Based on the mathematical definition and physical meaning, a fast effective method was studied to calculate mathematical inflection point using computer, and a algorithms was proposed to calculate the mathematical inflection point of discrete data using n
中文: 在数学定义及物理意义的基础上,研究了利用计算机来计算数学拐点的一种快速有效的方法,提出了对于离散数据以非拟合曲线的方式计算拐点的算法。
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英文: Numbers are still growing; but recently—it is impossible to know exactly when—an inflection point seems to have been reached.
中文: 目前人口还在增长；但是看起来，尽管我们无法知道确切的时间，人口增长的转折点已经快到了。
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英文: The report said: “It is hard to see China reaching the $15,000 inflection point before 2030, and India before 2040.
中文: 报告表示：“中国很难在2030年前达到1.5万美元的拐点，而印度则要到2040年之后。”
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