binary symmetric

例句：

1. 1. The computer uses binary code to communicate with the outside world.
   计算机使用二进制代码与外界通信。
2. 2.The binary system is used in many fields, such as mathematics and computer science.
   二进制系统在许多领域被使用，如数学和计算机科学。
3. 3. In binary, each digit represents a power of two.
   在二进制中，每个数字代表2的幂。