unit-distance code

例句：

1. 1. The unit-distance code is a method for encoding data in a way that makes it easier to transmit over long distances.
   单元距离编码是一种数据编码方法，使得在长距离传输时更加方便。
2. 2.In the unit-distance code, each character is assigned a unique number that represents its position in the sequence.
   在单元距离编码中，每个字符都被分配了一个唯一的数字，这个数字代表了它在序列中的位置。
3. 3.The unit-distance code was developed to improve the efficiency of data transmission over long distances.
   单元距离编码的发明是为了提高在长距离上数据传输的效率。