不是简单地试图打败对方或者建一个新纪录，许多极限运动是展现美，和谐和刺激的。

Instead of simply trying to defeat the other team or set a new record, many extreme sports are about beauty, harmony and thrills.

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研究谐和外力与有界噪声激励联合作用下的一类非线性振子的混沌运动。

This paper studies chaotic motions in a nonlinear oscillatory system perturbed by external harmonic force and bounded noise excitation.

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采用球冠谐和分析方法，首次得到了单个运动电子在全球的受力分布。

The global magnetic force distribution of single moving electron is firstly obtained by means of spherical cap harmonic analysis.

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