the belief that the world can be made better by human effort
例句
He was stationed on supply at the Melior Street. 他被派往米利尔大街做代理牧师。
secondly, in that he skillfully expressed his pessimism and meliorism, his ideas of nature and fate with the help of these musical properties; 其次，哈代往往借音乐性来揭示主题，表现他的悲观主义和“进化向善论”等思想，以及他的自然观、命运观；
