URI 被限定为只能使用 ASCII 字符子集 —— 只包含基于英语用户需求的 127 个字符 —— 这为非英语用户造成了很多障碍。
URIs are limited to the ASCII subset of characters -- only 127 characters based on the needs of English-speaking users -- and this causes much difficulty for non-English users.
因为编码页1252只包含所有unicode字符的一个子集，在编码页1252中没有对应编码的那些Unicode字符由一个所谓的替换字符来替代。
Since the code page 1252 contains only a subset of all Unicode characters, those Unicode characters that have no equivalent in code page 1252 are replaced by a so-called replacement character.
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