考虑一下数学：你在河牌的成败比有多少，而彩池提供的成败比是多少？

Think about the math: what are the odds that you'll hit on the river, and what are the odds that the pot is offering you?

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例如，让我们考虑一下正弦波，也即正弦曲线这样一个描述平稳反复振荡的数学函数。

For instance, let's consider the sine wave, or sinusoid, a mathematical function that describes a smooth repetitive oscillation.

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