The primary research shows that the evolution process of requirements can be regarded as normal when the requirements evolutionary process changing chart is consistent with the model trajectory.

初步研究表明，只要需求演化过程的变化图和模型的轨迹图一致，那么需求的演化过程就可以看成是正常的。

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The long run generally brings greater contentment, according to studies that chart the trajectory of happiness over a life span.

根据对整个生命过程的幸福轨迹图谱的研究，这样的长期行为通常会带来更大的满足感。

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The study of the past doesn't yield unalterable laws that allow one to predict the future with the same certainty that a physicist can chart the trajectory and velocity of a falling object.

NPR: 'Folly of Empire' Offers Critique of U.S. Imperialism

As the below chart illustrates, M2 Velocity resumed its downward trajectory about six months ago after recovering a little from the 2008 financial crisis.

FORBES: Goodbye Recovery, Hello Recession

If you were to chart this fund, you would see a very nice upward steady upward trajectory because of the different approach that each manager has to the market, the flexibility that each has.

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