Since the letters had been photocopied or mimeographed many times over, they were frequently illegible.
因为信件被复印或油印了多次，它们通常模糊不清，难以辨认。
It is now more than a decade since the contents of this book were first mimeographed and used in classes in price theory at the University of Chicago.
自从本书的内容第一次油印并在芝加哥大学的价格理论课程上使用以来，已有十多年了。
Moreover, it has not been feasible to keep the mimeographed notes from getting fairly wide circulation.
而且，不让这个油印本广泛传播，也已经是行不通了。
Moreover, it has not been feasible to keep the mimeographed notes from getting fairly wide circulation.
而且，不让这个油印本广泛传播，也已经是行不通了。
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