Lower-case letter
01
小写字母, 小写字符
a small letter used in writing and printing, as opposed to an uppercase
例子
The password must include at least one lower-case letter to be valid.
密码必须包含至少一个小写字母才有效。
In the new font, the lower-case letters are designed to be easily readable.
在新字体中，小写字母被设计成易于阅读。
