Examlex
The fact that we cannot travel faster than the speed of light means that it is theoretically impossible for us to make trips to distant stars within our lifetimes.
Crude Oil
A naturally occurring, unrefined petroleum product composed of hydrocarbon deposits and other organic materials, used as a fuel and raw material in chemical industries.
Opportunity Cost
Surrendering the chance for gains from other choices by opting for one path.
Machinery
Equipment, especially of a mechanical nature, used in the production process of goods.
Petroleum
A liquid that occurs naturally under the surface of the Earth, which can be processed into fuel and a range of chemical products.
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