Renewal or replacement: the process of old elements being replaced by new ones; metaphorically used for organizational or cultural regeneration.
企業は人材の新陳代謝を促すために若手を積極登用した。
The company actively promoted young people to encourage turnover and renewal of personnel.
コミュニティの新陳代謝が悪いと活気がなくなる。
If a community has poor renewal, it will lose vitality.
Metabolism: biological processes by which substances are broken down and converted, i.e., the general metabolic processes of the body.
年齢とともに新陳代謝が落ちて肌のターンオーバーが遅くなる。
With age, metabolism slows and the skin's turnover becomes slower.
運動すると新陳代謝が上がって消費カロリーが増える。
Exercise raises metabolism and increases calorie expenditure.