[] optimism (about/for/over sth) a feeling that good things will happen and that sth will be successful; the tendency to have this feeling 乐观；乐观主义◆There are very real grounds for optimism. 乐观的理由的确存在。◆The CEO expressed cautious optimism about the company's financial future. 这位首席执行官对公司的财务前景表示谨慎乐观。◆Both orders and business optimism rose last month. 对订单和业务的乐观情绪上月都上升了。OPPpessimism ⨁business / consumer / investor / market optimism 企业／消费者／投资者／市场的乐观情绪⨁to be brimming with / express / show optimism 充满／表达／表露乐观情绪⨁to boost / fuel / increase optimism 增强／增添／增加乐观情绪▸ˈoptimist