Under UV light, tar from the Gulf of Mexico oil spill lights up orange-yellow on the beaches of Gulf Islands National Seashore (picture) while clean sand glows purple in a long-exposure picture.

长曝光拍摄的图片中，大片的油污在紫外线下发出橙黄色的光，干净的沙子为紫色。这是海湾岛国家海滨沙滩上的情景。

youdao

Graduate student Kirby hopes that ultraviolet light can be used on beaches to guide oil-spill cleanup operations.

研究生Kirby希望紫外灯能用于指导沙滩上的油污清理工作。

youdao

When it looks good, you move on to the next light and surface, ” Barowsky explains. “Make your set tight, and don’t allow ambient light to spill onto the piece and affect color temperature.”

“你必须不断调整一个表面上的光线，直到调整好了为止”，Barowsky解释到，“把灯光安排的紧凑一些，不要让环境光漏进来影响色温”。

youdao

"As a result of LEDs it is now possible to place light exactly where it is needed and to greatly reduce spill light and energy wastage, " he said.

BBC: LED streetlamp aims to improve public's view of stars

When it comes to the Obamas planning their summer, is there any discussion now in light of the oil spill to them perhaps vacationing on a Gulf beach?

WHITEHOUSE: Press Briefing

The Energy and Climate Change Committee is looking at the British government's refusal to impose a moratorium on deepwater drilling in Britain and whether existing safety and environmental standards need updating in light of the massive spill.

CNN: BP's Hayward: Oil spill wasn't because of cost-cutting