Predictably, enthusiasm in open-source circles has spawned hundreds -- if not thousands -- of parallel clustering projects.

可以想像得到，开放源码圈内的高涨热情已导致产生了数百 -- 如果不是数千的话 -- 并行集群项目。

youdao

These lines,or circles,are parallel -- meaning that they are equally distant from each other at any point around the world.

VOA: special.2010.07.14