中文摘要：

摘要两个重要极限，在微积分中具有重要作用．但传统教学往往侧重于理论证明和例题讲解，忽略了它们的应用．本文通过“割圆术”与第一个重要极限、银行复利与第二个重要极限，阐述两个重要极限的应用，以期引起对两个重要极限实际应用的重视．

英文摘要：

The two important limits play an important role in Calculus. However, the traditional teaching ignores their applications but their theoretical proofs. In order to draw the attention to the application im- portance of the limits, the cyclotomy and the compound interest are illustrated.