on linea) using a computer to get information or to communicate with people 在线，在网上 You can book tickets on line. 你可以在网上订票。
Most of our sales staff now work on line. 我们的销售人员现在大多在线操作。
→ online b) working properly as planned 〔按计划〕运转，运行 a new nuclear reactor which should be on line by 2005 应于2005年前启用的一个新核反应堆
If there is a power failure, the emergency generators should come on line within 15 minutes. 如果停电，应急发电机应在15分钟内开始运转。
on line• All the classrooms are now on line.
→ on line at line1(3)