That little "a" with a circle curling around it that is found in email addresses is most commonly referred to as the "at" symbol. 小写字母“a”外加个圆圈，这一符号常出现在email（电子邮件）地址中，通常是作为“at”（在）的标记。 Surprisingly though, there is no official, universal name for this sign. There are dozens of strange terms to describe the @ symbol.
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