By default, this level is set to 0.20, and so there is a twenty percent probability that any given node will change its value and color.

默认情况下，这个标准设置为0.20，这样任意给定的节点就有百分之二十的可能会改变其值和颜色。

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By default, the instance is set up to use one type of authentication for all instance-level and connection-level requests.

默认情况下，建立一个实例，它将使用用于所有实例级和连接级请求的一种身份验证类型。

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A default quota level has also been set that applies to any new user or group.

默认配额已经进行了设置，可以适用于任何新用户或组。

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