Duke is one of four living moonwalkers from NASA's Apollo program.

杜克是美国国家航空航天局阿波罗计中四个活着的月球漫步者之一。

These particles got in the Apollo lunar landers and wore down the moonwalkers' spacesuits.

粒进入阿波罗登月飞行器，磨损了登月者的宇航服。