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blue giant
Astronomers spend a lot of time studying blue giants.
mineralogy
He is majoring in mineralogy at university.
mineral oil
Mineral oil is often used in the manufacture of cosmetics and pharmaceuticals.
(mineralogy) bieberite
This mineral is called bieberite, and it is very rare in the world of mineralogy.
(mineralogy) melanterite
This mineral is called melanterite, and it has a vivid green color.
bile duct
He underwent bile duct surgery.
call back, recall
He called me back immediately after he hung up the phone.
blue supergiant
A blue supergiant is one of the brightest stars in the universe.
(mining) bauxite
We are developing new technologies to mine bauxite.
birds of a feather flock together
He is always hanging out with bad friends. Truly, birds of a feather flock together.
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