1. 副业：by-lane 私道 | by-line 副业 | by-place 偏僻地方
2. 边线：budding star 初露锋芒的明星 | by-line 边线 | capacity crowd 观众满座
3. 铁路支线：by-electionbyeelection 递补选举 | by-line 铁路支线 | by-lineparergon 副业
4. 副业, 铁路支线：by-laws || 议事程序 | by-line || 副业, 铁路支线 | by-place || 偏僻地方,罕见的情景
noun
1. an auxiliary activity
Synonym: avocation hobby pursuit sideline spare-time activity
2. a line giving the name of the writer of a story or article
Synonym: credit line