But the most important thing that I think I need to learn from them is keeping an optimistic mind, be kind-hearted and treasure everything we own all the time.

但是，我觉得我要向她们学习的最重要的一点是保持乐观，善良的心态，珍惜我们所拥有的一切。

youdao

I am optimistic about our economy, because people like you have shown time and again that Americans are the most industrious, creative, and enterprising people in the world.

我对我们的经济形势仍很乐观，因为无数像你一样的美国人已经证明了，美国人是世界上最勤劳、最有创造力、最有事业心的民族。

youdao

Even the most optimistic and sociable people can be affected by deep melancholy and become introverts for some time.

即使是最乐观的，善于交际的人会受到深深的忧郁，变得内向了一段时间。

youdao

The most optimistic appraisals we've heard assume that winning the war in Iraq will take time.

NPR: Scoring the War in Iraq: Who's Winning?

Even on the most optimistic estimates, Dr Odimba will have to carry on referring his patients to Nouakchott General for some time to come.

ECONOMIST: Mauritania

I'm optimistic about our economic future, because Americans have shown time and again that they are the most industrious, creative and enterprising people in the world.

FORBES: Magazine Article