optimistic的名词形式
optimistic名词:optimism n.乐观;乐观主义 optimistic adj.乐观的;抱乐观看法的 派生词: optimistically (adv.) 例句: A mood of optimism swept through the company and its customers. 公司上下及其顾客都洋溢着一股乐观情绪。 Optimism was gradually taking the place of pessimism 乐观情绪逐渐取代了悲观主义。 Only...