pessimist是什么意思?

pessimist的中文含义详细解释：
n. 悲观主义者
pessimist的列举例句：
Pessimist tells us that the family as we know it is doom.
悲观主义者告诉我们说，我们现在的这种家庭注定要崩溃。

The man who is a pessimist before forty-eight knows too much; the man who is an optimist after forty-eight knows too little.
未逾四十八岁的悲观主义者，是知道得太多之人；而年逾四十八岁的乐观主义者，是知道得太少之人。