赛道有多宽指的是市场规模，赛道有多长指的是行业所处发展阶段，赛道是平坦还是崎岖指的是行业的竞争格局。
The width of the track refers to the scale of market, the length of the track refers to the development stage of the industry, and whether the track is easy or bumpy refers to the competitiveness landscape of the industry.