1·At the moment, urban landscapes are highly managed and limited in their spatial extent.
目前,城市景观被高度管理,空间范围受到限制。
2·As on the Moon, the extent of large impact cratering serves as an age indicator for the Martian surface.
和在月球的一样,大型撞击陨石坑的范围之广可以显示出火星表面的年龄。
3·Such programs are much needed because in many arid lands there is only a vague idea of the extent of groundwater resources.
这样的计划是非常必要的,因为在许多干旱地区,我们并不清楚其地下水资源的范围。
4·Little wonder the latest survey concludes that the extent and type of hospital teaching available differ a great deal across the country.
难怪最近的调查得出结论,医院教学的范围和类型在全国各地差别很大。
5·'Geo-engineering plans to inject stratospheric aerosols or to seed clouds would act to cool the planet, and act to increase the extent of sea ice,' says Rasch.
拉施说:“地球工程计划将平流层的气溶胶注入到云层中,这将起到冷却地球的作用,并增加海冰的范围。”