advance gradually in due order的用法和样例：
- Follow in order and advance step by step; advance gradually in due order; follow in proper sequence and make steady progress
- He could appear and greet her in due order.
- There he found everything arranged in due order.
- The honoured guests took their seats in due order.
- There he found everything arranged in due order,--the accusation, examination, Morrel's petition, M. de Villefort's marginal notes.