It may require warming a planet's surface, introducing oxygen to its atmosphere and creating a watersupply, among other massive undertakings.
在众多的巨大工程里面，或许还包括加热行星表面，为大气层输氧，创造水源等等艰巨任务。
2
Surfacewater resources is changed with water supply sources, but water supply sources can be changed by human activity.
地表水资源量的变化是随着补给源补给量的变化而变化的，人类活动可以改变地表水的补给源。
3
Select a location near the fixture that this water heater will supply. The water heater must be installed indoors and in a vertical position on a level surface.