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文摘本书是于去冬年假，选旧稿之简易者，加以整理，匆促完成，虽曾自行校对一次，遗漏与错误之处在所不免，尚望读者不吝教正为幸。</div>
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张泽熙</div>
<bdi><a href="https://en.wikipedia.org/wiki/en:Sichuan_University" class="extiw" title="w:en:Sichuan University"><span title="university in Chengdu, Sichuan, China">Sichuan University</span></a>
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