She finished her two-year apprenticeship with the carpenter and can now work independently.

apprenticeship 是由名词 apprentice（学徒）加上后缀 -ship 构成的名词。apprentice 指"跟随师傅学习手艺的人"，后缀 -ship 表示"身份、状态或关系"。 apprenticeship 指的是"学徒身份"或"学徒期"，即跟随师傅学习手艺的阶段。