这些决定是在普拉永公司做出的，目的是开发稀土。
对部分稀土离子参与下LeuRS催化的的氨酰化反应表观稳态动力学性质进行了研究。
The apparent steady state kinetics of the aminoacylation reaction catalyzed by LeuRS at the participation of some RE 3+ was studied.
美国和其他地方都有不少的稀土矿藏。
There are extensive rare earth deposits in the United States and elsewhere.
最稀有的稀土比金子还多200多倍。
The rarest rare earth is nearly 200 times more abundant than gold.
日本也在钻研不需要稀土新的制造工艺。
Japan is also pushing for new manufacturing processes that do not require rare earths.
专家说，毕竟“稀土”这个术语就不恰当。
After all, the term 'rare earths' is a misnomer, experts say.
在日本的各个参与者都努力回收稀土和金属。
Various players have tried to recycle rare earths and metals in Japan.
第三个问题是原材料出口，具体就是稀土出口。
The third concern is raw material exports, rare earth in particular.
稀土矿山常常也含有放射性元素，比如铀和钍。
Rare earth mines often also contain radioactive elements, such as uranium and thorium.
刚发出的这则“稀土禁令”只会加快这一趋势。
This latest rare earth ban is just going to accelerate this trend.
这座稀土矿至今已闲置十年。
这是海底可利用的稀土元素资源量首次得到确认。
It is the first time attainable rare earth elements were confirmed on the seafloor.
今天我们将继续报道稀土金属类的稀有化学元素。
Today we continue our report on the group of chemical elements known as rare earth metals.
对未来短缺的担忧已经使稀土价格暴涨。
不过，该矿缺乏把稀土矿石加工成成品的制造资产。
But the mine lacks manufacturing assets to process the ore into finished components.
从黑色的稀土开采驶向未来开始的绿色世界。
The road to the green world of the future starts from the black earth.
稀土有两种，一种是重稀土，一种是轻稀土。
Rare earth consists of two categories: one is heavy rare earth, the other one is light rare earth.
稀土是17种元素的总称，其实稀土并不稀少。
Despite their collective name, the 17 elements are not rare.
美国也有稀土矿资源，而且主要是在已关闭矿井中。
Those same rare earths are found in America, mainly in shut-in mines.
直到今天，稀土资源出口配额大部分涵盖了至少50%的稀土合金和氧化物。
Until now, the quotas mostly covered alloys and oxides with a rare earth content of at least 50 percent.
直到今天，稀土资源出口配额大部分涵盖了至少50%的稀土合金和氧化物。
Until now, the quotas mostly covered alloys and oxides with a rare earth content of at least 50 percent.
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