近20年来，CPU的速度呈指数式快速增长，而主内存的增长慢得多，大致是直线式的。

For about 20 years now, CPUs have increased exponentially in speed, while main memory has weakly linearly increased in speed.

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运用内梅罗指数法验证了改进的主成分分析法的结论，并得出了三个水期的相对污染程度。

The water quality of the Beitang Drainage River during these seasons was evaluated by the improved principal component analysis method and Nemerow index method.

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研究出一种脱离桐马路线的新型大电机模压主绝缘用环氧玻璃粉云母带，其结构温度指数为173.6。

This paper describes the development of a type of non-bismaleimide fiberglass mica tape with a temperature index of173.6, which is intended for moulding main wall insulation of large motors.

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