spacing of levee

例句：

1. 1.The book is set in the 19th century, with a spacing of 50 years between chapters.
   这本书设定在19世纪，章节之间有50年的时间间隔。
2. 2.The gap between the two countries has widened over the years.
   两国之间的差距多年来已经扩大了。
3. 3. The space between the tables is sufficient for people to move around comfortably.
   桌子之间的空间足够人们舒适地移动。