0 - you are unfamiliar with the subject area.
(0 -你不熟悉主题领域。)

1 - you can read / understand the most fundamental aspects of the subject area.
(1 -你可以阅读/了解主题领域最基本的方面。)

2 - ability to implement small changes, understand basic principles and able to figure out additional details with minimal help.
(2 -能够实现小的变化，理解基本原理，并能在最小的帮助下找出更多的细节。)

3 - basic proficiency in a subject area without relying on help.
(3 -在不依赖帮助的情况下，熟练掌握某一科目。)

4 - you are comfortable with the subject area and all routine work on it:
de
(4 -你对主题领域和所有日常工作都很熟悉:)
For software areas - ability to develop medium programs using all basic language features w/o book, awareness of more esoteric features (with book).
(对于软件领域来说，能够使用所有基本的语言来开发中等的程序，使用w/o book，了解更深奥的特性(带书)。)
For systems areas - understanding of many fundamentals of networking and systems administration, ability to run a small network of systems including recovery, debugging and nontrivial troubleshooting that relies on the knowledge of internals.
(对于系统领域——了解网络和系统管理的许多基础知识，能够运行一个小型的系统网络，包括恢复、调试和依赖于内部知识的重要故障排除。)

5 - an even lower degree of reliance on reference materials. Deeper skills in a field or specific technology in the subject area.
(5 -对参考资料的依赖程度更低。在某一领域或某一特定技术领域有较深的技能。)

6 - ability to develop large programs and systems from scratch. Understanding of low level details and internals. Ability to design / deploy most large, distributed systems from scratch.
(6 -能够从头开始开发大型程序和系统。了解低层次的细节和内部信息。能够设计/部署大多数大型的分布式系统。)

7 - you understand and make use of most lesser known language features, technologies, and associated internals. Ability to automate significant amounts of systems administration.
(7 -你理解并利用最不知名的语言特征、技术和相关的内部信息。能够自动化大量的系统管理。)

8 - deep understanding of corner cases, esoteric features, protocols and systems including "theory of operation". Demonstrated ability to design, deploy and own very critical or large infrastructure, build accompanying automation.
(8 -深刻理解角落案例，深奥的特点，协议和系统，包括“操作理论”。演示了设计、部署和拥有非常关键或大型基础设施的能力，并建立了相应的自动化。)

9 - could have written the book about the subject area but didn't; works with standards committees on defining new standards and methodologies.
(9 -本可以写关于主题领域的书，但没有;与标准委员会一起制定新的标准和方法。)

10 - wrote the book on the subject area (there actually has to be a book). Recognized industry expert in the field, might have invented it.
(10 -写在主题领域的书(实际上必须有一本书)。业内公认的业内专家，可能已经发明了它。)