}Use match to handle both cases (see Chapter 4 for match syntax):
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，这一点在传奇私服新开网｜热血传奇SF发布站｜传奇私服网站中也有详细论述
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And, although it is difficult to find references to knocking wood for good luck before the nineteenth century, it turns out that this is not the case for touching iron — the “tocca ferro” of Italy, shown above.