The first time polonium was obtained by Marie and Pierre Curie in 1898, separating polonium from uranium ores. Now polonium is obtained by nuclear reactions.
obtained in "How was it obtained?" means how did they get it.
nutrients obtained at the blood
Qualifications obtained
Lipids are obtained from the food we eat.
It is obtained from ore of platinum.
Cotton is obtained by ginning , spinning
Energy is obtained by proteins/carbohydrates in your body.
Petrolium is obtained from wells that pump out the petroleum.
Plutonium is not obtained it must be made.
It is obtained by parents and/or grandparents.
fossil fuels can be obtained in tanks
Carbon monoxide is obtained from plastic.