在索引 X 找到前面沒有高 Surrogate 字元的低 Surrogate 字元。可能不是使用此編碼方式輸入,或可能不包含有效的 Unicode (UTF-16) 字元。
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English version
Found a low surrogate char without a preceding high surrogate at index: X. The input may not be in this encoding, or may not contain valid Unicode (UTF-16) characters.