Let the white pollution disappear forever!

让白色染污永远消失！

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Secondly, competition will not disappear forever.

其次，竞争永远不会消失。

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In some SCM tools, the rollback feature really does make version 7 disappear forever.

有些配置管理工具，回滚功能真的使版本7永远消失掉了。

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Enron, on the other hand, may disappear forever as its collection of energy assets and trading contracts are gradually cleaned up and sold to others.

ECONOMIST: America's business recovery

Every time someone decides to stop receiving a paper bill, 24 pieces of First Class mail per year disappear forever (the bill, and the payment, each 12 times per year).

FORBES: First Class Mail is Doomed. Get Over it.

After a single viewing, those videos then disappear forever.

FORBES: Snapchat Adds Video, Now Seeing 50 Million Photos A Day