Even though there's four bytes the length of the string is consistent with what a human being would interpret as the length 3 of the string which is 3.

即使那里有4个字节,字符串的长度,与我们所认为的长度是一致的,字符串的长度是。

哈佛公开课 - 计算机科学课程节选

Gloucestershire's total was largely due to Lancashire's wayward bowling with seamer Peter Martin, who normally delivers a consistent line and length, allowing openers Tim Hancock and Kim Barnett to hit 27 off his first four overs.

BBC: Gloucestershire embarrass Lancs

Since the speed of light through a cable is consistent, the difference is entirely in the length of its path.

WSJ: A Dive Into the Digital Deep