melioration是什么意思

n.改善

1. The melioration of living conditions in the rural areas is a top priority for the government.
政府将农村地区的生活条件改善作为首要任务。
2. The introduction of new technology has led to a significant melioration in production efficiency.
新技术的引入使生产效率显著提高了。

改善；改良；提高