An extent is a block of physically contiguous space.
区段(extent)是一块物理位置连续的空间。
2
For example, the extent approach to block management had been implemented in JFS.
例如，在JFS中已经实现了使用区段(extent)来管理块。
3
In Afghanistan, two decades of warfare have degraded the environment to the extent that it now presents a major stumbling block for the country's reconstruction efforts.