The determination of total rare earth content of rare earth-magnesium alloy were studied. It was used oxalate to be sediment to determine of total rare earth content with gravimetric method.

主要研究稀土镁合金中稀土总量的测定。选择草酸作沉淀剂，重量法测定稀土总量。

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As the first batch of rare earth export quotas was released at the end of 2010, by how much will this year's total rare earth export under the quotas be reduced compared with that in last year?

我们在去年年底已经发布对于稀土出口的第一批的配额，请问今年全年的配额相加对于稀土的出口和去年相比，到底会减少到一个什么样的程度？

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A total solar eclipse has been making its way of crossing the South Pacific with a rare alignment of the sun, moon and earth, plunging a narrow corridor into darkness.

日全食正在经过南太平洋，这时候太阳，月亮和地球处于一条直线上，形成黑暗的走廊，这是比较罕见的。

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FYI, TMR is tracking a total of 429 rare-earth projects under development associated with 261 different companies in 37 different countries.

FORBES: The Coming Glut of Rare Earths

The European Commission estimates that those resources could total 9.16% of the global rare earth deposits.

BBC: Greenland rare earths: No special favours for EU