service lifeglossary / SERVICE LIFE service life. The period of the expected usefulness of an asset. • It may or may not coincide with the asset’s depreciable life for income-tax purposes. 词条贡献者 法律翻译Terris,毕业于欧洲顶尖的法学院,专注翻译各类与专利上诉有关的法律文件。