Now, this improvement to Unicode support has not come at a cost to performance.

现在这个对统一码支持的改进不是以牺牲性能为代价的。

And we've always had the goal that string processing in Swift is first in class without compromising on Unicode correctness.

我们的目标一直是让 Swift 里的字符串处理成为第一等级，而不必受制于统一码的正确性。

It think it has, also, unicode support.

它认为它也有 unicode 支持。

All the fun details are up to the platforms. Here's the emoji that is listed as grinning face with smiling eyes by unicode.

所有有趣的细节都取决于平台。这是被 unicode 列为笑脸和笑眼的表情符号。

Our concept of the character is actually a composition of multiple Unicode scalar values, and decomposing these correctly is critical to getting that fidelity with Unicode, the characters, and the string API.

我们对于字符的概念实际上是由多个统一码标量值构成的，正确地把它解构对于统一码的精确性以及字符和字符串 API 的精确性都至关重要。