You enroll and commit to a set number of classes at the beginning.

你加入之后，需要在开始的时候承诺参加一定数量的课程。

You just have to participate in an agreed number of classes per month to qualify.

你只需要每个月参加商定数量的课程就可以获得资格。

They probably have a limited number of classes.

他们的课程数量可能有限。

So The Sprint challenges you to accelerate your English speaking skills, your confidence and your fluency by attending a certain number of classes within ninety days.

所以呢，冲刺赛挑战大家通过在九十天的时间内参加一定数量的课程来加速英语口语技能、自信心和流利度。

When we say something counts, we mean that it is valid, that it is something that you can use for, in this case, the requirements that you have a certain number of classes to graduate with your Bachelor's degree.

当我们说某件事很重要时， 我们的意思是它是有效的，它是你可以使用的东西， 在这种情况下，要求你有一定数量的课程才能毕业并获得学士学位。

One is a " credit (credit) class." The other is a " non-credit class." A " credit class" is a class that counts towards, or is included in, the total number of classes that you need to take in order to graduate.

一种是“学分（credit）类”。另一种是“非学分类”。 “学分课程”是计入或包含在您毕业所需的课程总数中的课程。