We must imagine the early Earth as a mixture of rocky materials, metals, and trapped gases, subject to constant bombardment by smaller planetesimals and without much of an atmosphere.
我们必须想象早期的地球是岩石材料、金属和封闭气的混合物，受到较小的星子的持续轰击，没有多少大气。
The process is possible only with certain materials (plastics, resins and metals) and with a precision of around a tenth of a millimeter.
这个过程只能用特定的材料（塑料，树脂和金属），精度在0.1毫米左右。
This is partly driven by the rising price of raw materials and metals.
这在一定程度上是受原材料和金属价格上涨的推动。
Trading was important, as so many raw materials, the semiprecious stones for the decoration of the temples, timbers for roofs, and all metals, had to be imported.
由于大量原材料，如用于装饰庙宇的半宝石石料、建造屋顶的木材和所有金属都需要进口，贸易变得至关重要。
Materials science studies what makes up our world -- the metals, semiconductors, plastics we use to make all our devices, products, and technologies.
材料科学的研究决定了我们的世界——金属，半导体，塑料都用在了我们的设备，产品和技术上。
Incineration of heavy metals or materials with high metal content (in particular lead, mercury and cadmium) can lead to the spread of toxic metals in the environment.
焚烧重金属或金属含量高的材料(尤其是铅、汞和镉)可能使有毒金属传播到环境中。
We also seek to “mix it up” in terms of materials – beadwork, metals, wood, ivory, glass, textiles, ceramic, and so on.
我们也试图在材料方面进行“多元混合”——展物的质地有珠饰品、金属、木材、象牙、玻璃、纺织品、陶瓷等等。
Making integrated circuits involves depositing layers of materials such as semiconductors and metals on a silicon wafer.
制造集成电路需要将如半导体和金属等多层材料放置在硅片上。
Metals and other inorganic materials that do not turn into gas fall to the bottom of the chamber as molten slag.
金属和其他不能变成气体的无机材料，则会作为熔渣落到箱底。
But as such printers improve and become capable of using more durable materials, including metals, they've become a potentially interesting way to make working products.
不过，这类打印机的功能在不断改善，而且开始使用金属等更耐用的材料，因此它们正变成制作实用产品的潜在有趣工具。
Boeing and Airbus already are offering a new generation of larger jets built from fuel-saving lightweight composite materials instead of the ARJ21's traditional metals.
波音和空客已经生产出新一代更大型的喷气机，采用了省油轻质复合材料，而非arj21所采用的传统金属。
For many materials the process of turning them back into useful raw materials is straightforward: metals are shredded into pieces, paper is reduced to pulp and glass is crushed into cullet.
对许多材料而言，将它们转变为有用的原始材料的过程是非常简单的：金属物被压碎成碎片，纸被融合为纸浆而玻璃制品则被碾成玻璃碎末。
Metals and other inorganic materials that do not turn into gas fall to the bottom of the chamber as molten slag. Once it has cooled, this slag can be used to make bricks or to pave roads.
金属以及其它不能转化为气体的无机材料会落在密室的底部，成为熔渣，冷却下来可以用来作砖或铺路。
Many aircraft parts are made from highly specialised metals and other materials: will there be enough of these to go around?
许多飞机零部件都由高度专业化金属和材料制成，我们不禁要问：撑得住吗？
The first is the allowances given to companies in the five dirty industries covered by the ETS (electricity, oil, metals, building materials and paper).
其一是发放给ETS给出的五种污秽工业部门（电力，石油，金属，建筑材料以及造纸）的许可。
Other structures will be made from high tech materials called memory metals.
其它建筑物则由被称为“记忆金属”的高科技材料建造而成。
So, if we're going to go to the moon, we're going to go to Mars, we want to be able to produce oxygen, structural metals and photovoltaic materials from in situ resources.
如果我们要去月球上，我们要去火星上，我们则必须要制造，氧气，结构金属和光电材料，就在原地制造。
The substances in question include a bunch of rare-earth metals and a few other elements which—used a pinch here, a pinch there—enhance the way many industrial materials function.
讨论的对象包括了一堆稀土金属以及用于提高工业材料功能的少量元素。
But the real goal of this work isn't tiny maps. Rothemund says that in the future, tiny DNA shapes could serve as scaffolds for quickly building nanostructures made of metals or other materials.
但Rothemund的目的不是做微型地图，Ro themund说，将来在使用金属或其他材料构造纳米结构时，微小的DNA结构可以作为支架使用。
India is another key consumer of the metals and other raw materials that Rio Tinto produces, including copper, aluminium, coking coal and diamonds.
印度是另一个力拓公司的金属和原材料的主要消费国。印度消费的金属和原材料包括铜、铝、炼焦煤和金刚石。
The residue found in third-hand smoke includes heavy metals, carcinogens and, even radioactive materials that are dangerous to children.
三手烟残余中包含有重金属、和致癌物质，特别是放射性物质对儿童是危害重大的。
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 factory processes 300 tons of materials a day, and each ton yields only about 150 grams of rare metals.
这个工厂每天处理300吨材料，每吨只能提炼出150克贵金属。
When China's economy is strong, it ranks among the world's most voracious consumers of oil, metals and other raw materials.
经济强劲时，中国是全球最主要的原油、金属和其他原材料消耗国。
Everything in the universe -metals, gases, dogs, doughnuts -is made of materials with positive and negative charges.
宇宙中的任何物体都是由带有正电荷和负电荷的物质组成的。
Everything in the universe - metals, gases, dogs, doughnuts - is made of materials with positive and negative charges.
宇宙中的任何物体都是由带有正电荷和负电荷的物质组成的。
The residue includes heavy metals, carcinogens and even radioactive materials that young children can get on their hands and ingest, especially if they're crawling or playing on the floor.
这些包括重金属，致癌物资甚至放射性物资在内的残余物，沾满了婴幼儿的双手甚至被他们的呼吸道吸收。当婴幼儿在地板上爬行或者玩耍时，所受的污染尤甚。
This property is characteristic of waxes, putty, damp clay, plasters, and some metals, but not of many materials that are generally known as plastics.
这种性质是蜡、油灰、湿泥土、灰泥和一些金属的特性，但不是一般称为塑料的许多材料的特性。
The Quarren would provide the raw materials and metals while the Mon Calamari refined them into useful items of technology.
夸润人提供未加工的材料和金属，而蒙卡拉马里人将这些原料精制为有用的科技产品。
The Quarren would provide the raw materials and metals while the Mon Calamari refined them into useful items of technology.
夸润人提供未加工的材料和金属，而蒙卡拉马里人将这些原料精制为有用的科技产品。
应用推荐