对中的

• A surrogate pair is a coded character representation for a single abstract character that consists of a sequence of two code units , where the first unit of the pair is a high - surrogate and the second is a low - surrogate
  代理项对是由两代码单元序列组成的单个抽象字符的编码字符表示形式，代理项对中的第一个单元是高代理项，第二个单元是低代理项。