Even optimists admit the outlook to be poor.

甚至乐观人都认为前景不好。

I prefer my cynicism to your self-deceiving optimism.

我宁愿要我玩世不恭也不要你自欺欺人乐观。

His optimism blinded him to many problems.

他乐观态度使他对许多问题视而不见。

His optimism contrasted sharply with the low morale of his supporters.

他乐观情绪与他支持者低落士气形成了鲜明对照。

Pete, ever the optimist, said things were bound to improve.

一向乐观皮特说，事情必定是会好转。

He is a man of apparently boundless optimism.

他显然是一个极度乐观人。

His encouragement buoyed her up during that difficult period.

他鼓励使她在那段困难时期恢复了乐观情绪。

He is an optimistic young fellow.

他是位乐观轻人。

The man who is a pessimist before forty-eight knows too much; the man who is an optimist after forty-eight knows too little.

未十八岁悲观主义者，是知道得太多之人；而十八岁乐观主义者，是知道得太少之人。

The bugaboos in larger versions of this optimistic vision are highly variable flows of material, and decentralized, dilute concentrations of reclaimable stuff.

这个乐观观点描述最多，莫过于高变异性物质流动，以及可回收物质密度分散和稀释。