Because the process returns input unchanged if there's no match, You should utilize the thing.ReferenceEquals system to ascertain if the system has produced any replacements on the enter string.?�が?�詞?�し?�使?�れ?�場?�、物?�人?�元?�の位置?�状?�か?�新?�い?�の?�交?�さ?�る?�と?�示?�。