As for how to stiffen roads? Gregory says you could mix small amounts of synthetic fibers or carbon nanotubes into paving materials.

至于如何硬化道路？格雷戈里表示，可以将少量的合成纤维或碳纳米管混入铺路材料中。

Gregory says you could mix small amounts of synthetic fibers or carbon nanotubes into paving materials.

格雷戈里说，你可以将少量合成纤维或碳纳米管混合到铺路材料中。