In our class , boy students take six sevenths .

在我们班上，男同学占七分之六.

No ordinary family can afford to hire sevenths .

普通人家雇不起仆人。

Minor seconds and major sevenths are regarded as harsh dissonances , major seconds and minor sevenths as less harsh .

小二度和大七度为极不协和音程，大二度和小七度为不协和音程。