It is also important to note that the study found only a correlation, as researchers did not prove for certain that optimism leads to a longer life.

还值得注意的是，该研究只是发现了一种关联，因为研究人员并不能明确证明乐观与长寿有必然联系。

youdao

A positive learning attitude can not only improve the quality of study but also lay a good foundation for lifelong learning.

积极的学习态度不仅能提高学习的质量，而且能为终身学习打下良好的基础。

youdao

If we're going to force taxpayers to foot the bill for college degrees, students should only study those subjects that're of greatest benefit to taxpayers.

如果我们要迫使纳税人为大学教育的费用买单，那么学生们就只能学习那些对纳税人最有裨益的学科。

youdao

So for the ten patients in the study, doctors used a low amount of radiation to destroy only some of their marrow.

VOA: special.2009.12.16

This study shows that not only is it better for the person who is infected, but it helps that person from transmitting to the person that's their sexual partner, heterosexual partner."

VOA: special.2011.05.18

Leaving things as they are in the Arab world, the Institute for Peace study says, will result in cosmetic changes only, allowing autocratic rulers to fend off real democratic change.

VOA: standard.2010.05.19

He also criticizes the study for only taking into account heart attacks and other cardiovascular problems that occurred within two weeks after patients stopped taking Vioxx.

FORBES: Key Vioxx Claim Withdrawn

For this study we interviewed only people in executive positions, so any young person answering this survey worked in what is most likely a stressful position and had to work very hard to get there.

FORBES: Millennial Anxiety in the Workplace

So why does this tiny Phase I pilot study, successful for only four of six women, matter so much?

FORBES: Startling Treatment Breakthrough For Anorexia Leads To New Understanding Of Brain Disorders