他们签订了一份为期五年的学徒契约。
They entered into a five-year ___indenture for the apprenticeship program.
年轻的学徒被契约约束在这家工厂工作五年。
The young apprentice was ___indentured to work at this factory for five years.
这些契约详细规定了双方的权利和义务。
The ___indentures clearly specify the rights and obligations of both parties.