1·The structure of the reference the same track basic parameters of the crawler tractor, design the structure and size of crawler, make whole design are optimized.
履带的结构同样参考了履带拖拉机的基本参数，设计了履带的结构和尺寸，使整个设计得到了优化。
2·Bathed in xenon spotlights, the white spaceship, attached to its twin solid rocket boosters and orange external fuel tank, crept 3.4 miles on the back of an enormous tractor called the Crawler.
沐浴着氙气聚光灯光，白色的飞船，带着一对固体火箭推进器和橙色外挂燃料箱，在称为“爬行者”的巨大拖拉机上缓慢行驶了3.4英里。