结合势函数有限跃变和无限跃变的几种实例，讨论波函数一阶导数在势函数跃变处的连续性问题，从而进一步明确连续性条件。

Continuity on first derivative of wave function is discussed by means of several instances of finite and infinite transitions of potential function and hereby continuity conditions is pinpointed.

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俗话说：“骐骥一跃，不能十步，驽马十驾，功在不舍”。

As the saying goes: steed leap, not ten steps, ten inferior horse riding, Gong-in give up.

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