Examlex
As TSH levels increase, thyroxine levels should decrease.
Petroleum
A natural liquid found beneath the Earth's surface that can be refined into fuel, lubricants, and various types of petrochemicals.
Coal
A combustible black or brownish-black sedimentary rock, often mined for use as a fuel source in electricity generation and various industrial processes.
Unrestricted Submarine Warfare
A type of naval warfare in which submarines sink vessels such as freighters and tankers without warning, as opposed to attacks per prize rules (laws of war).
Pancho Villa's Raid
An attack conducted in 1916 by the Mexican revolutionary Pancho Villa on the American town of Columbus, New Mexico, leading to tension between the United States and Mexico.
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