NASA is moving ahead with plans to put a long-armed Lander on Mars’ icy North Pole to search for clues for water and possible signs of life. The $386 million Phoenix Mars is planned to touch down in
Last year, a special kind of glove came out. It was invented to help blind people to learn Braille, which is a special system for the blind to read by touching. Shaking motors (震动马达) are
符合题意。