I mean, it is hard to follow a 50 ton giant tractor, which had to wait almost a decade for tires large enough to carry its weight on the field.

我的意思是， 跟踪一台 50 吨的巨型拖拉机是很困难的，它必须等待近十年才能获得足够大的轮胎来在田野上承载其重量。