TRNGs are usually based on physical phenomena such as thermal noise, atmospheric noise, radioactive decay and even coin-tossing.

真随机数发生器的熵源通常来自于真实的物理世界，如热噪声，大气噪声，放射性衰减甚至掷硬币。

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If a losing male continues to be aggressive, the chances are he will be seriously injured (it is unlikely natural selection could have foreseen competitive coin-tossing).

假使一个失败的男性继续保持进攻性，那么他就会有严重受伤的可能。(自然选择不大可能会料想到竞争性的抛硬币)。

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The two boys agreed to decide the matter by tossing a coin.

这两个孩子同意用掷硬币的方法来决定这件事。

《新英汉大辞典》

One solution is to modify the coin-tossing model--to add bells and whistles until the equations match the observations.

FORBES: Mandelbrot: A Math Maverick Takes Stock

Price drops or runups that the coin-tossing model sees as impossible--changes with a probability of a millionth of a millionth of a millionth of a millionth--occur frequently.

FORBES: Mandelbrot: A Math Maverick Takes Stock

Langen, and his 37-year-old brakeman Zimmerman, won the right to go last after tossing a coin.

BBC: Germany take two-man title