Was he walking? He just hung near the door without letting go. Maybe he was afraid he would become space garbage floating above the Earth if he let go.

他在太空行走吗？不，他仅仅挂在舱门边不敢离开。也许他害怕一旦松手就会立刻成为漂浮在地球外空的宇宙垃圾！

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This way, the garbage collector will obtain more breathing space, decreasing the probability of a full GC.

通过这种方式，垃圾收集器将获得更多空间并减少完全GC的可能性。

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The current major version of NILFS is version 2, which is referred to as NILFS2. NILFS2 realized online garbage collection that reclaims disk space with keeping multiple snapshots.

目前NILFS的主版本是第2版，即NILFS2。NILFS2实现了在线的垃圾回收，在保持多个快照的同时回收磁盘空间。

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Johns Hopkins University's Applied Physics Laboratory, a leading space research center, recently conducted feasibility studies into junk-zapping lasers and garbage-collecting rockets.

WSJ: A Cosmic Question: How to Get Rid Of All That Orbiting Space Junk?