1、Complementary foods should be rich in nutrients and given in adequate amounts.
補(bǔ)充食品應(yīng)富含營養(yǎng)，同時(shí)要喂養(yǎng)充足。

2、He is believed to be rich in mind.
大家都相信他很有頭腦。

3、The islands are believed to be rich in deposits of oil and natural gas.
當(dāng)然這些島嶼下面都可能蘊(yùn)藏著豐富的油氣資源。

4、Read widely and you'll be rich in knowledge.
廣泛的閱讀，你就會(huì)豐富的知識(shí)。

be rich in翻譯