/ˈɒptɪmɪzəm ||; ˈɑptəˌmɪzəm/noun [U] the feeling that the future will be good or successful 乐观:
There is considerable optimism that the economy will improve. 有相当多的人抱乐观态度，认为经济将会改善。 [OPP] pessimism 反义词为pessimism➔optimist noun [C]: I am an optimist and I believe that the talks will be successful. 我是个乐观主义者，我认为谈判会取得成功。 [OPP] pessimist 反义词为pessimist