You can get all the information within a certain tag and replace it, or you can turn all the text to lowercase.

您可以获得某个标记内的所有信息并替换它，或者您也可以将所有文本变成小写的。

youdao

Convert a selection of text from uppercase to lowercase (or vice versa).

将选择的文字从大写字母转换为小写字母（反之亦然）；

youdao

The lower method converts all the characters in the calling string to lowercase.

lower方法将string中的所有字符转换为小写。

youdao

And we reasoned that these two eventually reach some kind of an equilibrium separation which we are using lowercase r to represent.

我们推导,这两个最终能达到,某种平衡分离,我们用小写的r代表。

麻省理工公开课 - 固态化学导论课程节选

You can brute force it and unfortunately, the so-called Caesar cipher is not very secure because if you assume, for our purposes in English alphabet with 26 characters, say all lowercase for all uppercase, my God, you only have to try like 24, 25, 26 possible rotations until you can figure out what his secret message is.

你可以强行解密但是不幸地是，所谓的凯撒密码不是很安全的,因为如果假设，对于我们的26个字符的字母表,指明所有的小写为大写，我的天，你只要试24，25次，26次就可以解答出,密文的内容。

哈佛公开课 - 计算机科学课程节选

f Well, call toupper pass this lowercase F F to this function called toupper it's going to return capital F and so what do I assign to s2 bracket zero?

调用toupper函数，传递这个小写,然后返回的是大写的,那么我对s2【0】赋值多少？

哈佛公开课 - 计算机科学课程节选

The book rightly recommends forcing users to mix uppercase and lowercase characters, digits and punctuation characters to create more secure passwords.

FORBES: Can You Trust Your Computer?

Mr. Newman says he didn't have to ask Apple for permission to use the lowercase i and had no trouble getting iHospital registered as a trademark in the U.S. and Europe.

WSJ: Hospitals That Mend the Apple Set

You'll need a password of 7 to 12 characters, one uppercase, one lowercase, one number and, preferably, one character like an exclamation point or ampersand.

FORBES: Magazine Article