1. 充实;使丰富
    To enrich something means to improve its quality, usually by adding something to it.

enrich什么意思

    e.g. An extended family enriches life in many ways...
           大家庭在很多方面会使生活更加丰富多彩。
    e.g. It is important to enrich the soil prior to planting.
           在种植前给土壤增肥很重要。

2. 使富有;使富余
    To enrich someone means to increase the amount of money that they have.

enrich什么意思

    e.g. He will drain, rather than enrich, the country...
           他会耗尽而不是增加该国的财富。
    e.g. Those who know how to use the system can enrich themselves at the expense of the very people who work for those companies.
           那些懂得如何利用现行体制的人使自己富有起来，而代价是牺牲真正为那些公司工作的人。

3. 浓缩（核燃料）
    To enrich a nuclear fuel such as uranium means to increase the number of atoms of a particular kind in it, so that it can be used to produce more energy or a greater explosion.

enrich是什么意思

    e.g. It was actually used for enriching uranium to weapons-grade levels.
           实际上，它是用来将铀浓缩以制造武器。