run-on time

例句：

1. 1. The project has a run-on time of three months.
   这个项目的运行时间为三个月。
2. 2. The machine only runs for a few minutes before it needs to be recharged.
   这台机器只运行几分钟就需要充电了。
3. 3. The train is running on time, so we can expect to arrive at the destination on schedule.
   火车正点运行，所以我们可以预期按时到达目的地。