What's not clear, he says, is whether happy feelings are the key to longevity or if it's something else that causes extended life.

他说，不清楚的是，是否感觉快乐是长寿的关键还是其他的一些事情造成生命的延长。

youdao

A group of psychologists from the University of Arizona and Washington University in St. Louis set out to find whether happy and unhappy people differ in the types of conversations they tend to have.

来自亚利桑那大学和华盛顿大学圣路易斯分校的一队心理学家开始着手研究快乐的人和不快乐的人各自可能发生的谈话种类是否会有所不同。

youdao

Hunched shoulders and a hanging head give a powerful indication of whether the person is happy or not.

耸肩和耷拉着脑袋有力地暗示着这个人是否快乐。

youdao

When the people gathered together on one of the great trial days, they never knew whether they would see a bloody killing or a happy ending.

VOA: special.2009.04.18

How do I determine whether or not I am happy?

我如何判断自己是否幸福？

哈佛公开课 - 幸福课课程节选

"I'm very happy about it." "I don't know whether this will be my main stopping point or not, but it certainly does give meanother option."

VOA: standard.2010.07.28

So, what's less certain is whether a happy partnership will prevail between the coalition parties.

BBC: Budget: Osborne package will test coalition strength

Yet those who remember such minute details about the village where the boy would be born cannot recall whether they were ever happy when they were living there or whether, when they left, they were sad to be going.

NPR: One Boy's Heroism in the Face of AIDS

To assess emotional over-involvement, the researchers looked at the extent to which family life centred on the child, and whether the mother was happy to leave her child with others and whether she has interests which are not related to the child.

BBC: NEWS | Health | Donor embryo children 'not told'