zhè / tiáo / xīn / tiělù / yòng / le / gāozhìliàng / de / gāngguǐ / lièchē / xíngshǐ / gèng / píngwěn

这条新铁路用了高质量的钢轨，列车行驶更平稳。

This new railway uses high-quality steel rails, so the trains run more smoothly.