Before the Rnd function can be called, a call to the Randomize procedure must be made to initialize the random number generator.

调用Rnd前，必须先调用Randomize过程以初始化随机数字生成器。

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Before the Rnd function can be called, a call to the Randomize procedure must be made to initialize the random number generator.

调用Rnd前，必须先调用Randomize过程以初始化随机数字生成器。

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