为研究两者之间的关系，在光纤不同弯曲直径下，对多模光纤激光器的输出性能进行了实验测量和理论计算。
To study the relationship, the output capability of multimode fiber laser is measured under various bending diameters, and it also be calculated theoretically.
研究金钱与幸福关系的经济学家们一致发现，在一定的收入之上，两者之间就并没有可靠的关联。
Economists who study the relationship between money and happiness have consistently found that, above a certain income, the two do not reliably correlate.
不过，作者们承认未能一一证明所有可能的变化因素，并提醒这是项观察研究，不能就此得出这两者之间存在因果关系的结论。
But the authors acknowledged that they could not account for all possible variables, and cautioned that it was an observational study that draws no conclusions about cause and effect.
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