We are busy every day. We have four classes in the morning, and two in the afternoon.
我们每天都很忙。我们上午有四节课，下午两节。
We come to school at seven. We have four classes in the morning and two in the afternoon.
我们七点到学校。我们上午有四节课，下午两节。
We have four classes in the morning and two in the afternoon. After classes, we join in various activities, such as ball games, painting, singing and dancing.
我们上午有四节课，下午两点。课后，我们参加各种各样的活动，如球类运动、绘画、唱歌和跳舞。
I have taught fifth-grade classes for four years.
我教五年级已经有四年了。
Most undergraduate courses, such as software engineering, have four fifty-minute classes each week.
大多数本科生课程，比如软件工程学，一周有四节课，每节课50分钟。
We usually have a morning class and four classes in the morning, four classes in the afternoon.
我们通常有一个早晨上课，早上上四节课，下午上四节课。
We have only four classes left. Do come to the class in the last four classes. Thanks!
我们只剩下四次课了。请同学们最后的这四次课务必来上课。谢谢！
Mr. Liu said four classes of English have to be held concurrently, and since there are only three teachers in the department including himself, I'll have to take over one section.
刘先生说四组英文应当同时间上课的，系里连他只有三个先生，非我担任一组不可。
In this paper, four classes different multi-processors parallel DSP system based on ADSP2106X have been discussed. The application of parallel DSP in FFT algorithm is also illustrated.
文章讨论了基于ADSP2 1 0 6x的四种多处理器并行处理器的实现方法，并给出了在快速付里叶变换中的应用实例。
In this paper, four classes different multi-processors parallel DSP system based on ADSP2106X have been discussed. The application of parallel DSP in FFT algorithm is also illustrated.
文章讨论了基于ADSP2 1 0 6x的四种多处理器并行处理器的实现方法，并给出了在快速付里叶变换中的应用实例。
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