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[Subject: Generalities]
Translated by: PEZZUOLI CLAUDIO
Translated in 34 languages
[Subject: Physics]
- Activitate care implică un efort mental sau fizic, în vederea obţinerii unui rezultat.
Translated by: VALERIU RAUT
Translated in 72 languages
Translated in 65 languages
Translated by: NICOLAE DRAGU
Translated in 1 languages