通过应用各种编码技术，字位的组合不但可以用来表示二进制数，还可以表示其他离散符号，比如十进制数字和字母表上的字母等。
By using various coding techniques, group of bits can be made to represent not only binary number but also other discrete symbols, such as decimal digits or letter of alphabet.
研究表明，低马赫数情况下叶轮离散噪声主要是由脉动力造成，为降低低马赫数下的叶轮离散噪声提供了参考。
Results show that under small Mach number the main source of discrete noise is the fluctuating force, which gives a guide for cutting discrete noise down.
针对齿数、模数的规范性和离散性要求，进行了相应的离散优化处理。
To satisfy the requirement of the standardization of serrate number and module of gear, the corresponding discrete optimization is provided.
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