1. Besides the many internal cleanups, there are of course also new features. From the release notes. 除了众多内部实现的清理以外，Rails 3当然也增添了新的特性。
2. It gives you an opportunity to do cleanups if the script was aborted in the middle of its execution. 如果脚本在其执行时被终止，这给了你一个机会去做清理。
3. Bills have been introduced to limit the liability of municipalities and Banks for Superfund cleanups. 一些法案已经制定出来，减轻了城镇和超巨额基金银行的责任。
4. Green volunteer work projects send people to nature cleanups and preservation efforts all over the world. 绿色义工行动计划是在全世界范围内，将人们派向大自然进行清理和保护工作。
5. The Kernel Janitors project kept (and in fact is still keeping) a list of smaller bugs and cleanups that needed to be fixed. Kernel Janitors项目保持了(实际上现在还在保持)一个列表，内容是需要修复的较小缺陷和解决方法。
