与博弈论直接相关的是某些具有大量过剩雌性的寄生蜂种类的性别比例。
Immediately relevant to game theory are the sex ratios in certain parasitic wasp species that have a large excess of females.
“腿的长度和心脏病之间有一个直接成比例的危险关系，”乔治·大卫·史密斯说。
"There's a directly proportional risk between leg length and heart disease," says George Davey Smith, m.d..
这并非全然正确。Facebook实际上保留了小比例的用于直接出售的国内广告空间。
That's not entirely true: Facebook actually reserved a small percentage of its domestic AD space for direct selling.
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