1. He foresaw that the job would take a long time.
   他预见到做这件工作需要很长时间.
2. She's long past retirement age.
   她早已过了退休的年龄.
3. Lay up supplies for a long journey.
   为漫长的旅途储备给养
4. Her long skirt was trailing along/on the floor.
   她的长裙拖在地板上.
5. The professor's erudition came from long years of study.
   这位教授的学问来自长年累月的钻研。

　1个副词解释