他修改了几处。
He made several corrections to the letter.
他在信上改正了几个错。
I have to make several corrections in my homework.
我需要把作业改正一下。
Indeed, in several cases, we find that corrections actually strengthened misperceptions among the most strongly committed subjects.
的确，在某些案例中，我们发现，竟然使错误修正中最强烈的承诺的科目。
The paper also gives some corrections to several theorems and their proofs about the dimension of the modular lattice ih the books" Modern Algebra" by Wu and "Abstract Algebra" by Xu.
并对“近世代数”（吴品三）、“抽象代数”（徐诚浩）中有关模格维数几个定理证明的遗漏，作了某些补证。
Principle of seismic ct technique and several mathematic methods for realizing image reconstruction are briefly introduced herein. Necessary errors corrections are pointed out.
本文简要介绍了地震CT技术的方法原理及实现图像重建的几种数学方法，指出了必要的误差校正处理。
Principle of seismic ct technique and several mathematic methods for realizing image reconstruction are briefly introduced herein. Necessary errors corrections are pointed out.
本文简要介绍了地震CT技术的方法原理及实现图像重建的几种数学方法，指出了必要的误差校正处理。
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