In general, the lower 128 characters of a multibyte character set map to the 7-bit ASCII characters, and any byte whose ordinal value is greater than 127 is the lead byte of a multibyte character.

• 通常，多字节字符集中最低的128个字符对应于7位ASCII字符，其他任何序数值大于127的字节都是多字节字符的引导字节。