Last time we talked about photosynthesis, the process by which plants use light to convert carbon dioxide and water into food.
上次我们讨论了光合作用，即植物利用光将二氧化碳和水转化为食物的过程。
Nowadays scientists are finding light pollution can be almost as bad as carbon dioxide pollution.
如今科学家们发现光污染几乎和二氧化碳污染一样有害。
Carbon fibre is an expensive alternative to making things in steel or aluminium, but besides being extremely strong it is also very light.
碳纤维可以被用于代替钢铁或是铝，但其造价十分昂贵；它不仅有极其强的张力，而且质地非常的轻。
What's the carbon footprint of a can of Miller Light?
生产一罐米勒淡啤酒的碳足迹是多少？
While the device is certainly in its earliest stages of development, the discovery does show that carbon nanotubes can efficiently convert light to electricity.
虽然这种设备还处于最早期的开发阶段，这一发现确实表明了碳纳米管可以高效地将光转化为电能。
Carbon composites are extremely strong and light.
碳复合材料极端坚韧和质轻。
This ingenious triple threat of an idea could simultaneously reduce carbon emissions, cut electricity costs and reduce light pollution, without sacrificing the safety that streetlights bring.
这简直是一个一举三得的天才创意，既能同时减少碳排放，又能减少电力消耗，还能减少光污染，而不用牺牲路灯带来的安全感。
Though still in the very early stages of development, if perfected, carbon nanotube-based cells could provide a more efficient method of converting light to electricity.
尽管这项研究还处在非常初级的阶段，但是如果能改进完善，基于碳纳米管的电池将可以提供一种更有效的方法将光转化为电能。
The carbon footprint of urban dwellers is relatively light, says a report by David Dodman in the April issue of Environment and Urbanisation.
城市居民的碳足迹其实是相对小的，这就是大卫·多德曼在《环境和城市化》的四月刊号中提出的发现。
"It's a kind of very light carbon nanotube material, " said Lei Zhai, the associate professor of chemistry at the University of Central Florida who led the material's development.
带领材料开发团队的中佛罗里达大学的化学副教授翟磊（音）说：“这是一种非常轻的碳纳米管材料。”
Blades: Light, stiff carbon fiber replaces fiberglass at critical points in the blades, so they lose pounds and gain strength.
风叶特点：风叶的关键部位由轻质、强度高的碳纤维替代传统的玻璃纤维，结果是重量得到减轻而强度却增加了。
Crank arms attached to this platform are made from 7000-series aluminum, and to keep it light, the platforms that hold bikers are made of carbon fiber.
附连着这个平台的曲臂由7000号铝制成，为了保持车子轻便，承载车手的平台均用碳纤制成。
The plan is to shift to efficient, low carbon bus rapid transit systems and light rail, and to retire old buses and replace them with lower carbon alternatives, such as hybrid vehicles.
城市交通规划的目标是向节能、低碳型快速公交系统转变，淘汰老旧公交车，用混合动力车等低碳车辆对其进行更换。
For example, 50% of the new Boeing 787 is made out of carbon fibre, making it light and fuel efficient.
比如，50%的新型波音787由碳纤维组成，使其更轻，更省油。
They would leave subtle clues in the isotopic composition of the limestone by shifting the ratios of light to heavy carbon and oxygen atoms in its calcium carbonate.
因为如果是那样的话，阳光将会被转换成大量的碳、氧原子保存到石灰岩中的碳酸钙里，而事实却是，岩层的同位素组成（Isotopic composition）中没有留下任何蛛丝马迹。
And the use of light-absorbing particles with low thermal conductivity, such as agglomerates of carbon nanoparticles, and carbon coated glass micro-shells.
以及运用了类似碳纳米微粒团和碳涂层玻璃微球这样的低热传导率的吸光微粒。
In April, when it came to light that she was concerned about global warming, seven separate resolutions to limit carbon emissions were passed by an overwhelming majority.
四月，当有消息称Proxmire十分关注全球变暖时，7家公司正式决定限制二氧化碳的排放的提议以压倒多数的结果获得通过。
Studying the light in each image could also reveal physical characteristics, such as the presence of water or carbon dioxide.
研究每个行星图像中的光线同样可以揭示物理特性，如是否存在水或二氧化碳。
Plants naturally take in carbon dioxide they need for photosynthesis, the process of changing light energy to chemical energy.
植物天生吸收二氧化碳来进行光合作用，这是一种将光能转化成化学能的过程。
The cash will go toward basic research, product development and manufacturing of light-emitting diodes (LEDs) and carbon-containing organic light-emitting diodes (OLEDs).
这笔经费将用于基础研究，新产品研发和发光二极管、含碳有机发光二极管的制造方面。
This inefficiency is the big reason why in the United States, the power used to light Edison bulbs produces half as much carbon dioxide as the country's car fleet.
灯泡的这种无效率，是为美国在电能灯泡方面排放的二氧化碳相当于其车船排放量一半的最大原因。
Carbon composites are extremely strong and light. They are already used in products ranging from tennis racquets to aircraft wings.
复合碳材料质轻而坚韧，已经在从网球拍到飞机机翼的广大范围内得到应用。
So now that you know that becoming a parent could lead to a legacy of 262 times more carbon emissions than failing to convert to energy-saving light bulbs, are you still keen to start a family?
所以现在，既然你知道了，为人父母会造成比未转换为节能灯泡多262倍碳排放量的“碳遗产”，那么，你仍然渴望成家吗？
Others are more optimistic, especially in the light of advances in engineering and materials science since the last attempt - notably in lightweight carbon fibre composites and energy-dense batteries.
其他人比他乐观得多，尤其是自从上次尝试以来，我们在工程和材料学方面又有了更多启发——值得一提的是我们发明了轻质碳纤维化合物和高能量密度电池。
Two is the weight of a carbon black products there is a certain weight particularly light may be made by charcoal which did not reach the adsorption effect.
二是重量，一个炭雕产品是有一定重量的，特别轻的可能是由一般木炭制成，这就达不到吸附作用了。
The algae use light and carbon dioxide in the water to carry out photosynthesis and produce oxygen, they are the producers.
藻类利用光线和水中的二氧化碳进行光合作用，产生氧气，是系统中的生产者。
Indoors light is furnished by carbon arc lamps incandescent bulbs and quartz bulbs. the basic indoor lights are spotlights and floodlights. spotlights throw a beam of concentrated intense light.
室内光源有碳弧光灯，白炽灯及石英灯等。室内的主光源是聚光灯和散光灯、泛光灯。聚光灯将光聚到一起。
Indoors light is furnished by carbon arc lamps incandescent bulbs and quartz bulbs. the basic indoor lights are spotlights and floodlights. spotlights throw a beam of concentrated intense light.
室内光源有碳弧光灯，白炽灯及石英灯等。室内的主光源是聚光灯和散光灯、泛光灯。聚光灯将光聚到一起。
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