German automaker BMW has presented a new model that permits drivers to change the vehicle's colors.
德国汽车制造商宝马推出了一款新车型，该车型能让驾驶者改变汽车颜色。
The concept car, called BMW iX Flow, was recently shown at the CES technology show in Las Vegas, Nevada.
这款名为“BMW iX Flow”的概念车最近在内华达州拉斯维加斯的国际消费类电子产品博览会（简称CES）科技秀上展出。
A concept vehicle is one that has been produced for demonstration purposes, but is still in development.
概念车是出于演示目的被生产出来但仍在研发中的车。
The company says an electronic ink technology makes it possible to change the car's outside colors and add patterns.
该公司称一种电子墨水技术可以改变汽车的外部颜色以及添加图案。
The same kind of technology, which BMW calls Electronic Paper Display, is used in electronic reading devices.
同样的技术，宝马称之为电子纸显示屏，被用于电子阅读设备。
A demonstration at CES showed the iX Flow model changing from white to gray.
CES上的演示将iX Flow模型车从白到灰的颜色变化展现出来。
The changes are possible in each panel of the vehicle.
模型车的每块车身金属板都可以实现这种变化。
This permits several possibilities for different color and pattern combinations all around the car.
这为车身呈现多种不同颜色和图案的组合提供了可能性。
The demonstration included one setting that created racing stripes.
该演示包括令车身呈现出赛车条纹这一场景。
BMW says the material that enables the technology contains differently charged white, black or colored particles.
宝马公司表示，实现该技术的这种材料包含带有不同电荷的白色、黑色或彩色粒子。
Different colors appear when an electrical field is activated.
当电场被激活时，会有不同的颜色出现。
Signals to activate the changes can be sent by controls inside the car or by phone.
激活这种颜色变化的信号可以通过车内控制装置或电话发出。
The company said no energy is required to keep the color the driver chooses.
该公司表示，使汽车保持驾驶者所选择的颜色不需要消耗能源。
"We took this material – it's kind of a thick paper.
“我们采用这种材料——它有点像一种很厚的纸
– and our challenge was to get this onto a 3D object like our cars," BMW research engineer Stella Clarke told Reuters.
——我们的挑战是把它用到三维物体上，比如我们的汽车，”宝马研究工程师斯特拉·克拉克告诉路透社。
"My favorite use case is the use of color to influence sunlight reflections," Clarke said.
“我最喜欢的用例是利用颜色来影响阳光反射，”克拉克说。
"On a hot, sunny day like today, you could switch the color white to reflect sunlight," she explained.
“在像今天这样炎热的晴天，你可以把车身颜色切换成白色来反射阳光，”她解释道。
"On a cold day, you could switch it to black to absorb the heat."
“在寒冷的日子，你可以把车身颜色切换成黑色来吸收热量。”
The vehicle shown at CES could only change between gray and white.
在CES上展示的概念车只能在灰色和白色之间切换。
But the automaker says the technology will be expanded to include a wide choice of colors.
但这家汽车制造商表示，这项技术将扩展到将更多颜色选项包括在内。
