0 - you are unfamiliar with the subject area.
0分——不熟悉学科领域。
1 - you can read/understand the most fundamental aspects of the subject area.
1分——能够阅读或者理解学科领域最基础的方面。
2 - ability to implement small changes,understand basic principles and able to figure out additional details with minimal help.
2分——能够实现小的改变，理解基本原则，并且能够在最小的帮助下找到附加细节。
