It will be helpful to think of rolling two differently colored dice, like a red die and a blue die.

可以考虑掷两个不同颜色的骰子（如一个红色骰子和一个蓝色骰子）。

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Let's assume for this example that you want both sum (you rolled a 10) and face (you rolled a 6 and a 4) results and that there's no difference between a 6 on a red die and a 6 on a blue die.

让我们假定，在本例中，您需要同时获得总和(掷出10)和骰面(掷出6和4)结果，并且红色骰子的6点与蓝色骰子的6点没有差别。

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If the red die lands on a 1, there are six possible results, one for each side of the blue die.

如果掷红色骰子的结果为 1，则有六个可能的结果，每个结果取决于蓝色骰子的一面。

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