A rare element was found last year.

去年发现了一种稀有元素。

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Uranium is very valuable because it is a rare element.

铀很贵重，因为它是稀有元素。

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In order to find out the diggings of gold and rare element, then you get the stone samples?

为了找金矿和稀有物质矿，你们才去找石头样品的吧？

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Rare Element Resources Ltd. shares are currently trading up about 1.2% on the day.

FORBES: Bullish Two Hundred Day Moving Average Cross - REE

But Mr Ambani brings a rare element to this mix.

ECONOMIST: Reliance bids for LyondellBasell

At this point and for the foreseeable future, Avalon, (AVL) Molycorp (MCP), Rare Element Resources (REE) and others are proceeding to develop production facilities in the United States to reduce dependence on the unpredictable Chinese.

FORBES: Avalon Rare Metals Announces Shelf Registration