[医][=first heart sound]第一心音
网络 第一心音; 第一心音幅值; 第一荐椎
C1 be the right-most character of s1.
C1是S1最右侧的字符。
The first part, S1..., that´s easy. Sn.
第一部分是,S1,这很容易,Sn
Record a script called S1, and build it.
记录名为s1的脚本,并构建它。
S1: How many boys?
S 1:多少男孩?
So, the address is 71 so what ends up in s1?
地址是71,那么最终s1是什么?