The optimist proclaims that we live in the best of all possible worlds, the pessimist fears this is true.

乐观主义者声称相比前生和来世，我们生活的世界是最好的，悲观主义者就怕这是真的。

The optimist claims that we live in the best of all possible worlds, the pessimist fears that this is true.

乐观主义者相信我们居住的世界是最好的世界，而悲观主义者，就害怕这是真的。

The optimist proclaims that we live in the best of all possible worlds; and the pessimist fears this is true.

乐观主义者宣称，俺们生活再最美好得世界里，而悲观主义者则害怕哲湜真得。

In the best of all possible worlds, every person would have access to the best that science and medicine can offer.

在理想的世界中，人人都应有机会获得科学和医学所能提供的最佳服务。

In the best of all possible worlds (for RIM anyway), MyBlackBerry will serve as a space for customers to provide support for each other.

在所可能的情况中，最好的一种情况“我的黑莓”成为消费者相互提供帮助和支持的空间。