一个显著的例子：在苹果公司仅有一人负责利润和亏损。
One striking example: there's only one person Apple with responsibility for a profit and loss.
可以把这种对应看作是各负责另一人之安全的两人同行制，每一个自然数都与某个正分数配对，反之亦然。
You could think of this correspondence as a buddy system in which each natural number is paired with some positive fraction, and vice versa.
几个部落围聚在一个范围内，大家为了解决一些共同面临的问题，推举一人出来做盟主，负责处理部落与部落之间以及对外等问题。
Several tribes clustered in a field where a man was elected to be the chairman for solving the common problems existing among tribes and the issues regarding foreign relation.
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