the act or process of improving the quality or power of something by adding something else

The soil needs constant enrichment with organic matter. 土壤需要不断添加有机物质。

The children who do well on such tests are those whose parents read to them and take them on enrichment excursions. 这类测试做得好的孩子是那些父母会读书给他们听，还带他们去拓展旅行的孩子。

the process of increasing the level of a particular isotope (= one form of an atom) in an element in order to make it more powerful or make it explode more powerfully

He said that sanctions would not force his country to suspend uranium enrichment. 他说，制裁不会迫使他的国家中止铀浓缩活动。