double-byte characters 双字节字符 ; 双位元组字元
single-byte characters 单字节字符
Register double-byte external characters 注册外部双字节字符 ; 登记册双字节字符外
Prior to adjacent strings being concatenated, a string cannot be longer than 16380 single-byte characters.
在相邻字串进行串连之前，字串长度不可超过16380单一位元组字元。
Also, CODEUNITS32 specifies that Unicode UTF-32 is used to understand the character boundaries of multi-byte characters.
同样，CODEUNITS32指定使用Unicode UTF - 32来理解多字节字符的字符边界。
Recognizing the character as a single, unit as opposed to a sequence of bytes, is a requirement in the case of string manipulations involving multi-byte characters.
将字符看作一个单元而不是一个字节序列，这是进行多字节字符的字符串操作的必要条件。
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