I have been so moved by the generosity of donors, the passion of volunteers, and the perseverance, bravery and optimism of the survivors.

捐款者的慷慨、义工的热诚，生还者的坚毅、勇敢和乐观，都使我深深感动，他们也感动了世界。

youdao

There have been various studies carried out on optimism and while I have a few reservations on extreme optimism, one can't deny the role optimism plays in enhancing your personal growth.

目前已经有关于乐观的各种各样的研究，虽然我对极端的乐观主义持有保留意见，但一个人是无法否认乐观在强化个人成长中所起到的作用的。

youdao

I would have liked to tell you that my work on optimism grew out of a keen interest in the positive side of human nature. The reality is that I stumbled onto the brain's innate optimism by accident.

我很想说我对乐观主义的研究是出于对人类本性积极一面的强烈兴趣，但实情是，我是偶然踏入大脑的先天乐观性这个领域的。

youdao

But I have great optimism that we have begun to dig ourselves out of this hole.

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Down through the years I have seen despair and frustration evolve into optimism and progress and, even now, we must not abandon efforts to achieve permanent peace for Israelis and freedom and justice for Palestinians.

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And what makes me confident is seeing all of you and seeing what I see all across America -- people who have drive and who have optimism and who are decent and do right by their families and do right by their communities.

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