For example, petroleum may exist in many parts of India and Kuwait that have sedimentary rocks, but until the time it is actually drilled out and put into use, it remains a potential resource.
例如，矿物油可能存在于印度的许多具有沉积岩的地区，但是要开采出来并投入使用，仍需要花费一定的时间，因而依然属于一种潜在资源。