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This is Scientific American — 60-Second Science. I'm Christopher Intagliata.
LEDs use only a quarter the energy of incandescent bulbs. But despite their efficiency, there is one thing they're not that good at: "They have a hard time giving directional light." Sangam Chatterjee, a physicist at the University of Marburg and the University of Giessen, in Germany.
Chatterjee and his colleagues may have fixed that. They devised a highly focused, but still energy-efficient light beam, by starting with something that's already a highly focused beam: a laser. The key is what they shoot the laser at: a substance with a particular structure. "I'm always tempted to say "white powdery substance" but I guess there's some connotation on that."

They synthesized the material from cages of tin and sulfur atoms decorated with hydrocarbon molecules. The laser-produced infrared light — which the human eye cannot see — goes in, but what comes out are many different optical wavelengths. "It's a molecular light converter. It basically changes the color of the light, while retaining the directionality of the lasers. So you can make something like a white laser beam containing many, many colors." That mix of colors, overall, glows bright white, like a halogen bulb in a beam. The study is in the journal Science.
This sort of low-energy focused white beam could be used for the very small — like a light source for microscopes — to the very big. "You could use this for a spotlight in the theater. And in the end it should be much more energy efficient than the typical standard spotlight." Meaning focused white light…that takes a little heat off the environment.
Thanks for listening Scientific American — 60-Second Science Science. I'm Christopher Intagliata.

参考译文

这里是科学美国人——60秒科学HzKolG(v-9ui.g。我是克里斯托弗·因塔利亚塔D4Wghoxk,lV)。
LED灯使用的电量仅为白炽灯的1/4G&;ezpF!=tpy+。虽然LED灯高效节能，但是它们也有不擅长的事情：“它们不能发射平行光n*Fa6S*hngHi。”桑伽姆·查特吉是德国马尔堡大学和吉森大学的物理学家WvXD|O5@0k+^qSeAGl。
查特吉和他的同事可能已经解决了这个问题K+3|w_6KFS@Z|h=sL。他们通过高度聚焦的光束——激光，发明了一种高度聚焦且节能的光束0SXX#5xL&5k3g。关键就是用激光照射一种拥有特殊结构的物质843L#SRd.x*)oj*8^P。“我一直想说是白色粉状物质，不过我想关键是内部的东西)zveSSJN~Wfom。”
他们用烃分子修饰的锡和硫原子合成了这一材料gXH]k*FzSkfrD。激光发出的红外线肉眼看不到，红外线进入后会产生很多不同的波长RwSBIIx~(HV+T。“这是一种分子光转化器0u&8&b1v-fn38s+NJV[。可以改变光的颜色，但同时保留激光的方向性HrhZ;j[C*G[&[Hy.Y8&-。这样就可以制造出含有很多种颜色的白色激光束CsFWl;T-[la。
这种低能聚焦白色光束既可以应用于显微镜光源这种小物件上，也可以应用到大场合vTBN|0PTRoiCCyX~。“这种光束可以用作剧院的聚光灯^@e[s0jzelB~+z%2Rzf*。比普通的标准聚光灯更加节能,u@_G3g]Mp%UaLN%NOa。”这表明聚焦白光可以消耗环境中的一部分热量qm121ETX~(6。
谢谢大家收听科学美国人——60秒科学QTA*.C]KMo^,-s]FSD)。我是克里斯托弗·因塔利亚塔ugSM,D;iSfb]Zzt。

译文为可可英语翻译，未经授权请勿转载！

重点讲解

重点讲解：
1. be good at 擅长的；精通的；能干的；
例句：He is good at mental arithmetic.
他擅长心算GD@4a@|)=H]i。
2. start with (以做某事) 开始；
例句：I wanna start with a song that means a lot to me.
我打算由一首对我意义非凡的歌开始vk%n[7*14rc。
3. be tempted to do sth. 想做…的；希望做的；
例句：I was sorely tempted to complain, but I didn't.
我极想发牢骚，但还是没开口S(Z,].],Rr9am3。
4. in the end 最终；
例句：He debated buying a new car, but didn't in the end.
他思量很久是否买辆新汽车，但最后还是没买-64_MlR0;(]b。