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(chemistry) rare earth elements
Rare earth elements are essential materials for the manufacture of electronic devices.
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.
reuse
This bottle is reusable.
user; consumer / employer
Who is the user of this software?
employee / servant
He is the most competent employee of our company.
something that has gone unused
Are you really not going to use this unused laptop?
(phonetics) nucleus
The nucleus is the central part of a syllable in phonetics.
Kyūjitai form of 主権 (“sovereignty”)
This country maintains its sovereignty.
the Sabbath; the Lord's Day
I go to church with my family on the Sabbath.
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