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(chemistry) rare earth elements
Rare earth elements are essential materials for the manufacture of electronic devices.
rare earth
Rare earth is an essential material for the manufacture of electronic devices.
yttrium, Y
Yttrium is one of the rare earth elements.
one thing
He ate one apple.
(chemistry) element, chemical element
Hydrogen is the most abundant element in the universe.
first, initial / one-eyed
This is my first question.
an isotope
An isotope refers to elements with the same atomic number but different numbers of neutrons.
a transition element
Transition elements play an important role in chemical reactions.
(chemistry) chemical element
Oxygen, which is one of the chemical elements, is necessary for us to breathe.
one-eyed goblin, a Japanese monster
The one-eyed goblin was dancing in the forest.
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