Through analyzing the trip time of typical urban public transit mode, the author puts forward main ways of enhancing the commercialspeed of public transit.
通过对典型城市公交出行时耗的分析，提出了提高公交出行速度的主要途径。
2
Germanium is already used in many commercial chips simply to improve the speed of electrical circuits, but it has much better optical properties than silicon.
锗早已应用于许多商用芯片中，虽然只是简单地用于提高电路速度，但相对硅来说其拥有好得多的光学性质。
3
China is the first and only country to have commercial high-speed train service on conventional rail lines that can reach a top operational speed of 350 km/h.