求翻译：注：“课程性质”栏A表示通识Ⅰ课程（A1为必修，A2为限选，A3为任选）；B表示通识Ⅱ课程（B1为必修，B2为限选，B3为任选）。是什么意思？

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Note: The nature of the curriculum," said liberal I A column (A 1 courses as a compulsory subject is limited to 2 A A option 3, for optional); B said liberal II courses (B B 2 1 as a compulsory subject is limited to 3 to select, B optional).

Note: “The curriculum nature” the fence A expression passes the knowledgeⅠThe curriculum (A1 is compulsory, A2 is limited to elects, A3 is no matter what elects); B indicated passes the knowledgeⅡThe curriculum (B1 is compulsory, B2 is limited to elects, B3 is no matter what elects).

Note: the "course" in column a, said General ⅰ curriculum (A1 is compulsory, A2 limited elections, A3 is optional); b General II curriculum (B1 is compulsory, limited B2 selected, B3 is optional).

Note: The "nature of the curriculum," said the Liberal column A Ⅰ courses (A1 as a compulsory, A2 for the limited selection, A3 is optional); B Ⅱ General Education courses that (B1 as a compulsory, B2 for the limited selection, B3 is optional) .