This is a very common topic, it should be for people to understand the computer is not difficult to understand this point of view and in the previous practice was common analysis of the problem.
这是个很常见的话题，应该来说对于懂计算机的人都不难了解，本文在前人的观点和实践上进行了常见问题的分析。
To detect a moving point target that is submerged in noisy background is a very difficult problem.
要把淹没在噪声背景中的运动点目标检测出来是一个十分困难的问题。
The teaching of the Lenz's law is a difficult point in electromagnetics teaching . The pedagogy inquiry of the Lenz's law is discussed in connection with this problem.
楞次定律是电磁学教学中的难点。针对这一问题讨论了楞次定律的教法。
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