短语词组短语serve before the mast 充当普通水手sailor before the mast 普通水手sail before the mast 普通水手;做普通水手lay before the mast 集合a sailor before the mast 普通水手Two Years Before the Mast 七海豪侠;航海两年;航船的两年;水手两年 返回 before the mast