It's called the cease and desist letter. What were their names?

这叫最后通牒 她们叫什么来着？

This was the first alphabet to call each symbol a letter and represented a specific sound.

这是第一个将每个符号称为一个字母，并代表一个特定发音的字母表。

We sometimes call these upper case letters, upper case, " case, " letters.

我们有时称这些大写字母，upper case, " case, " letters。

There's actually some interesting history about these call letters, or call signs.

关于这些呼号或呼号实际上有一些有趣的历史。

C, we have the ability to look (see) and we also have the beautiful ocean called the letter C (sea).

C，我们有看（see）的能力，我们也有美丽的海洋，叫做字母C（sea）。

You'll also find one of our English Through Story Mysteries called Deadly Letters; all of that on our ESL Podcast Store.

你还会发现我们的英语故事谜题之一， 叫做致命信件；所有这些都在我们的 ESL 播客商店中。

Jacqueline Springer there. So she calls cassette tapes audio love letters– because people often compiled – or put together – their own collection of songs on tapes and gave them to the boy or girl they liked.

上述是杰奎琳·斯普林格的观点。她称盒式磁带是有声情书。因为人们会将收藏的歌刻在磁带里，然后给他们喜欢的男生女生。