学习一门新语言是一种充实人生的体验，它能让你更好地理解不同文化。

Learning a new language is an ___enriching experience that helps you understand different cultures better.

这种牛奶添加了维生素D以增强营养。

This milk is ___enriched with vitamin D for better nutrition.

核电站使用的铀需要经过浓缩处理以提高其可裂变物质的含量。

The uranium used in power plants undergoes an ___enriching procedure to boost its fissile material concentration.