We all know people who seem to be perpetually positive, optimistic, and energetic.

我们都认识一些始终保持积极、乐观心态，并且精力充沛的人。

youdao

Unless you are incredibly cynical about what you do, you’ve got to believe that you have positive impact if you are going to be optimistic about what you do.

除非你是难以置信的愤世嫉俗，否则你将会相信如果你乐观对待在做的事情，那么一定会有一个积极的影响。

youdao

Be optimistic about your company and focus on steps you can take to have a positive impact on its future.

和他人分享工作的成功。对公司有信心才能对自己美好的未来有积极的影响。

youdao

In other words, if we train our brains to be optimistic or pessimistic -- to navigate, intentionally or not, the streets and avenues of positive or negative feelings -- we change (just as cab drivers do with their spatial circuits) the emotional circuits in our brains that determine how we respond to the things that happen around us.

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This mixed opinion makes it difficult to make any prediction for the future, but what is clear is that companies with a positive or optimistic view of the US economy will be more likely to want to drive innovation and change.

FORBES: Innovation and Growth: Which Comes First, the Chicken or the Egg?

But he was optimistic he will be able to end his seven-year career racing for the French team with a positive result.

BBC: Superb Hamilton storms to pole