The shell doesn't have a large collection of arithmetic operators, but it's sufficient for most programming tasks, including bitwise shifts, remainders, and comparisons.

Shell并没有提供大量的算术操作符，但是已经足以完成大多数编程任务，包括移位、求余和比较。

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In this paper, we propose a new implementation of bit level arithmetic coding by use of integer additions and shifts.

本文提出了一种利用整数加法和移位实现二值算术编码的方法。

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