optimist

Even optimists admit the outlook to be poor.

甚至乐的人前景不好。

We are optimist and realist.

我们是乐者，又是现实者。

an incurable optimist; an incurable smoker.

坚定不移的乐者；不可救药的烟民

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

一向乐的皮特说，事情必定是会好转的。

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

未逾四十八岁的悲者，是知道得太多之人；而年逾四十八岁的乐者，是知道得太少之人。