代码片段节点计算一个值或执行某一任务。

A snippet node computes a value or performs some task.

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表达式是针对特定的上下文节点计算的，在这个例子中是整个文档。

The expression is evaluated with respect to a certain context node, which in this case is the entire document.

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他们能被使用用合成节点计算以图像为基础的运动模糊。

They can be used to compute image based motion blur with the compositing nodes.

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And we can calculate that with the formula that we used, which was just n minus l minus 1 equals the number of nodes.

这个我们可以用我们以前用过的那个公式来计算，也就是节点数等于ｎ减去ｌ减去１

麻省理工公开课 - 化学原理课程节选

And, in fact, these are the only two types of nodes that we're going to be describing, so we can actually calculate both the total number of notes and the number of each type of node we should expect to see in any type of orbital.

事实上，我们只,描述这两种节点，所以我们可以,计算任何轨道中的,总结点数以及各种节点数。

麻省理工公开课 - 化学原理课程节选

And we talked about the equation you can use for radial nodes last time, and that's just n minus 1 minus l.

我们讲过这个用于,计算径向节点的方程，也就是ｎ减去ｌ减去１

麻省理工公开课 - 化学原理课程节选