学徒的身分,学徒的年限
Apprenticeship \Ap*pren"tice*ship\, n.
1. The service or condition of an apprentice; the state in
which a person is gaining instruction in a trade or art,
under legal agreement.
2. The time an apprentice is serving (sometimes seven years,
as from the age of fourteen to twenty-one).
apprenticeship
n : the position of apprentice