optimism
n[U]
tendency to expect the best in all things; confidence in success; belief that good will triumph over evil in the end 乐观; 乐观主义
He was still full of optimism for the future despite his many problems. 他尽管有许多问题, 但对未来仍十分乐观.
There was a feeling of optimism in the country when the new government was elected. 经选举产生新政府, 举国上下对前景十分乐观. Cf 参看 pessimism.