以下为句子列表：
英文: 2Intermittent User.No real communication is possible except for the most basic information using isolated words or short formulae in familiar situations and to meet immediate needs.Has great difficulty understanding spoken and written English.
中文: 只属于偶尔使用英语，除非在熟悉的情况，使用单词和简短的短句表达最基本的信息，在说写方面有重大的障碍。
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英文: A formal definition of proposition formulae was provided by context-free grammar, and the conversion from proposition formulae to polynomials was solved automatically.
中文: 摘要该文将命题逻辑的定理证明转换为多项式方程的求解问题，从而提出了一种基于非子句的代数化方法。
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英文: Abstract: Based on the deformation characteristics of the tread element at typical load cases,this paper determines the displacement functions of the element by using the energy method and derives the theoretical formulae for the apparent compressive stif
中文: 文摘:根据轮胎胎面单元在典型工况的变形特点，用能量法确定了胎面单元变形的位移函数，导出了轮胎胎面单元表观压缩刚度和表观剪切刚度的理论计算式。
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英文: At first using the method of inverse kinematical analysis, the computing formulae of displacement, velocity and acceleration of each component in the seven-bar mechanism and variation law of motion for the two expanding and contracting bar were derived, a
中文: 摘要首先运用逆运动学分析的方法，推导出了七杆机构中各个构件的位移、速度和加速度计算公式以及两个伸缩杆的运动变化规律；然后结合分析实例，根据输出构件的运动规律，计算出驱动件的运动规律，最后分析了传动误差。
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英文: Based on 9 years' field data of bed-load transport and the corresponding hydraulic parameters at the Erwangmiao hydrology station on Dujiangyan river, 6 formulae for the prediction of the sediment transport are analyzed.
中文: 摘要以都江堰二王庙水文站9年实测的卵石推移质输沙率资料和对应的水力参数为基础，选用6个有代表性的公式进行了分析计算和对比。
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