In the old system, two years of carpentry would be wasted if you wanted to switch to general studies, but in the new system you could keep credit for at least half of it.
在舊的系統中，學習兩年的木工課程後如果想轉到普通課程，一般會認為很浪費學分，但是新的系統可以讓你保有至少一半的學分。