This sediment layer is enriched in the rare metal iridium and other elements that are relatively abundant in a meteorite but very rare in the crust of Earth.
这一沉积层富含稀有金属铱，以及其他在陨石中较丰富而在地壳中十分罕见的元素。
It is an increased area of low thick clouds, the type that reflects a rare portion of solar energy back to space and cools the Earth.
它是一片变大的低厚云层，这种云层将少量的太阳能反射回太空，为地球降温。
These decisions were made at PRAYON to develop rare earth.
这些决定是在普拉永公司做出的，目的是开发稀土。
Existing lasers use media ranging from crystals doped with rare-earth elements to specific mixtures of gas and even certain sorts of semiconductors.
现有的激光器使用的介质有，掺杂有稀土元素的晶体、特定比例的气体，甚至是某些特定半导体。
The most problematic materials may be rare-earth metals such as neodymium used in turbine gearboxes.
真正棘手的原料是稀土金属，比如用在涡轮机变速箱中的钕。
The latest carmaker to seek a rare-earth alternative is Toyota.
最新开始寻找稀土代替品的汽车制造商是丰田。
Most commentators believed that the supply crunch would ease once new (or mothballed) rare-earth mines are opened.
多数时事评论家认为，一旦一座新的稀土矿被开采之后，供给困境就会有所缓解。
The rare-earth element that other industrial countries worry about most is neodymium.
其他工业国家所最担忧的稀土元素是钕。
Ms Chegwidden says announcements of rare-earth projects around the world have accelerated in recent months.
Chegwidden 女士说，最近几个月全球范围内稀土项目的发布频率，已经在提速。
One target: neodymium, a rare-earth essential for magnets used in everything from microphones to wind turbines.
有一个目标是：钕，一种稀土元素，用于从话筒到风力涡轮机等一切使用磁铁的产品。
But Mr Zhu did not answer a reporter's question about when normal exports of rare earth minerals would resume.
但是朱先生没有回答一个记者的提问即关于何时才能恢复稀土矿正常出口问题。
The WTO’s ruling could help America and others in any dispute with China over rare-earth materials, which are used in high-tech products.
在美国等国家与中国的稀土原料（用于高科技产品）争端中，世界贸易组织（WTO）这项裁定对美国一方会有所帮助。
Other types of magnets could be used in turbines, and rare earth metals could be recycled.
其他种类的磁铁可以用在涡轮机上，稀土金属可以循环使用。
The third concern is raw material exports, rare earth in particular.
第三个问题是原材料出口，具体就是稀土出口。
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。
However, rare earth is often radioactive. Moreover, in the smelting and extraction of rare earth, dangerous chemicals are frequently used, thus polluting local air, water and land.
但是，稀土生产往往带有放射性，加工企业在冶炼和分离稀土时，也经常使用危险的化学品，周围的空气、水和土地容易遭到污染。
It is the first time attainable rare earth elements were confirmed on the seafloor.
这是海底可利用的稀土元素资源量首次得到确认。
Besides the microdots, each batch also contains a unique combination of up to 30 compounds of rare-earth metals.
除了小微粒，每批粘着剂都包含着特异的多达30种稀土的金属复合物。
This latest rare earth ban is just going to accelerate this trend.
刚发出的这则“稀土禁令”只会加快这一趋势。
The lab is mixing particles, just 20 to 30 nanometers in size, of rare-earth magnetic materials with a non-rare-earth complement (tin cobalt).
他们的实验室正在尝试将只有20到30纳米大小的稀土磁性颗粒和非稀土填充物（锡钴）混合在一起。
There are extensive rare earth deposits in the United States and elsewhere.
美国和其他地方都有不少的稀土矿藏。
Today we continue our report on the group of chemical elements known as rare earth metals.
今天我们将继续报道稀土金属类的稀有化学元素。
Rare earth mines often also contain radioactive elements, such as uranium and thorium.
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.
稀土矿山常常也含有放射性元素，比如铀和钍。
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