运用时间管理体系处理事情，别让事情控制你。
Use a time management system to control events, rather than have events controlling you.
它们在处理版本化、管理、跟踪控制上极为有用，可以添加进来。
They are extremely useful to handle versioning, management, and tracking control and can be added to the picture.
处理变更、管理版本控制、更新设计和修复问题都需要付出大量的努力。
Handling changes, managing version control, upgrading designs, and fixing problems all require a tremendous amount of effort.
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