In lab tests using blood samples from human volunteers, the scientists showed that a drop of blood placed on the strip caused a color change that indicated blood type.

研究人员从志愿者身上采集血液样本用于试验，将血液滴在试纸上，根据试纸颜色的变化来区分血型。

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Scientists still have a lot of work to do before the color-changing molecules can be used outside the lab.

在这种变色分子走出实验室投入应用之前，科学家们仍有大量工作要做。

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In a park in Paris city centre, pigeons were fed by two researchers, of similar build and skin color, wearing different colored lab coats.

在巴黎市中心的一个公园里，两名体型和肤色都相似的研究人员穿着不同颜色的实验室工作服去喂一群鸽子。

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As I say, red tends to be chosen, but then if you get lab experiments showing that that particular color of gas blue is somehow or another sort of more invasive of your consciousness than red is, then you move away from the arbitrariness of the choice of red as a color.

所以人们就倾向于选择红灯，但是如果你想用实验证明,比如说烟蓝色或者,其他任何另一种颜色比红色更加醒目，那么你就忽视了颜色选择上的任意性。

耶鲁公开课 - 文学理论导论课程节选

Mr. ROY BERNS (Scientist, University of Rochester in New York): We're in the spectral color reproduction lab.

NPR: Using Science to Rescue Art

Among the visitors are elementary school students who do small chemistry experiments related to color and absorption of liquids in a BASF lab and learn how everyday products get made.

FORBES: Chemistry Lesson