The country is not optimistic.

这个国家现在不乐观。

youdao

But he is not optimistic.

但他并不乐观。

youdao

He's right: Americans are not optimistic.

他说得对：美国人现在不乐观。

youdao

The study also found that women who were not optimistic were more likely to smoke and have high blood pressure or diabetes.

VOA: special.2009.04.15

That may or may not work -- I'm not optimistic -- but at least it's the same idea. We're changing payoffs.

这似乎无济于事,我对此也并不乐观,但至少我们得承认,它改变了收益

耶鲁公开课 - 博弈论课程节选

Optimistic people, and again, not Pollyannaish detached optimism, but grounded optimists, on average, live significantly longer.

乐观的人，不是指盲目的乐天派，而是脚踏实地的乐观主义者，平均而言，明显更加长寿。

哈佛公开课 - 幸福课课程节选

They were not optimistic about their likelihood of success, and their fears were prescient.

FORBES: The Fiscal Crisis Of The Welfare State

Another vote is scheduled for late Friday, but I am not optimistic that it will mean much.

FORBES: The Week Ahead: More "Bizarro World"

But, without the spur of an outraged public, Ms Collins is not optimistic about the prospects for reform.

ECONOMIST: The police