Nowadays many people travel across China in terms of height-speed trains.有错误吗？

这句话的语法没有错误，但是用词有一些问题。可以改为： "Nowadays, many people travel across China using high-speed trains." 修改说明： 1. "in terms of" 可以改为 "using"，更加简洁明了。 2. "height-speed" 应该改为 "high-speed"，因为正确的拼写是 "high-speed"。