Most American colleges and universities use the grading system of A,B,C,D and F.

VOA: special.2009.03.05

So they began to call this A and this B and this C and this D and this E, this F, this G.

他们开始把这叫做A,B和C,这个是D,E,F,G

耶鲁公开课 - 聆听音乐课程节选

We got to go C, D, some kind of E, F.

而是C,D,某种E,F

耶鲁公开课 - 聆听音乐课程节选

In nineteen eighty-four, the John F.Kennedy Center for the Performing Arts in Washington,D.C.

VOA: special.2009.11.29

We can't go C, D, D-sharp, F.

不能是C,D,升D,F

耶鲁公开课 - 聆听音乐课程节选