回收由于行删除而丢失的空间。

Recapture lost space due to row deletions.

youdao

天文学家长期以来都在推测，最终可能会在星际空间或者是在难以探测的大量星系中发现丢失的重子质量。

Astronomers have long speculated that the missing baryonic mass might eventually be discovered in intergalactic space or as some large population of galaxies that are difficult to detect.

youdao

例如，一种文件系统可能是以提高速度为目的而优化的，另一种文件系统偏重高效地使用空间，还有一种文件系统偏重于防止数据丢失或损坏。

For example, one file system may be optimized for speed, another for efficient use of space, and yet another for durability against data loss or corruption.

youdao