optimism 

  1. 名詞
不可數名詞: 樂觀
樂觀主義
optimism about/for ...(事物):
對...的樂觀

    同義字詞
bullishness,sanguinity

例句

  1. Optimism wins in the long run.
  2. My optimism did not make me stupid.
  3. His optimism is what kept me going.
  4. There was a lot of optimism back then.
  5. Is there data to support this optimism ?