Web 2.0 means communicating, sharing, discussing and trading online in very useful ways never possible before.
Web 2.0意味着以前所未有的、有效的方式在线沟通，分享，讨论和交易。
But once inside the event horizon (the surface of a black hole) it is never possible to communicate with the outside.
但是，一旦进入视界(黑洞的表面)，就绝无可能与外界交流了。
The FIFA team recommends spending three to five days at altitude, although it is never possible to recover full sea-level fitness levels in this way.
FIFA队伍建议在海拔高处待上3~5天，虽然这样也永远不可能恢复到海平面时的全部水准。
I worked in the house and the garden, and every day I planned to escape, but it was never possible.
我在屋子里、花园里干活，每天都计划着逃跑，但一直没能成功。
I worked in the house and the garden, and every day I planned to escape, but it was never possible.
我在屋子里、花园里干活，每天都计划着逃跑，但一直没能成功。
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