The sea bed be rich in mineral.

海底有丰富的矿物质。

I hope to be rich in the future.

我希望将来变得富有。

He is believed to be rich in mind.

大家都相信他很有头脑。

Fiber is found to be rich in vegetables.

纤维广泛存在于蔬菜中。

Canada used to be rich in coal deposits.

加拿大曾经盛产煤矿。