n.

1. 前进
2. 连续
3. 发展；改进
4. 【数】级数
5. 【天】行星的顺行

n.

1. gradual movement or development towards a destination or a more advanced state.
   ▸Music  a passage or movement from one note or chord to another.
2. a number of things in a series.
3. Astrology  a predictive technique in which the daily movement of the planets represents a year in the subject's life.