So in that sense, historically, the German letter that's written kind of like the  letter B (the Eszett) does historically come from a ligature of the long S and the letter Z even  though it is pronounced as a double S today.

因此从这个说，从史看，写法有点像字 B（Eszett）的德语字史确实来自长 S 和字 Z 的连字，尽管今天它的发音是双 S。