velocity of landslides的用法和样例：
例句
- Giant boulders still littered the road and the surrounding mountains were scarred with huge landslides, some of which had buried whole villages.
路上依然布满大石块，周围山上都是大规模滑坡的痕迹，一些山体滑坡掩埋了整座整座的村庄。 - It is a new subject of geo-hazard study to provide safe lands for constructi on for the settlement of immigrants on the basis of landslide trea tment.
在防治滑坡的基础上，为移民迁建提供安全可靠的建设用地是三峡地质灾害研究的新课题。
