平衡选择（balancing selection），自然选择的一种形式。杂合子具有最高的适合度，从而得以维持基因座上的多态。
在这些情况下，建议您基于数据平衡选择分区键。
In such cases, it is recommended that you choose a partitioning key based on even data balancing.
在某些情况下，您可能会发现根据并置和数据平衡选择恰当的分区键的准则会相互矛盾。
In some cases, you might find that guidelines for choosing the proper partitioning key based on collocation and data balancing contradict one another.
OBS网络中结合了电路交换和光分组交换的优点，是两者之间的平衡选择。
OBS networks combine electronic switching and optical Packet switching's strongpoint, is a balanceable choice.
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