用户编写的 Map 操作需要输入并生成一组中间键/值对。
The Map operation, written by the user, takes an input pair and produces a set of intermediate key/value pairs.
在微软的风格指南中说,中间键“应该分配给界面上已有的操作或功能”而一度将它定义为右键的储备。
In its style guide, Microsoft states that the middle button "should be assigned to operations or functions already in the interface," a definition it once reserved for the right mouse button.
要使用映射键从数据源检索数据以构造中间对象,请执行以下操作。
To retrieve data from a data source using mapped keys for constructing an intermediate object.
Let's re-draw this, so it looks a little bit neater, where we have a triple bond in the middle instead, and again, we need our negative 1 charge there.
让我们重写这个,这样看起来更整洁一点,我们有一个三键在中间,同样地,我们这里需要一个负电荷。
So again, this is an anti-bonding orbital, and what you see is that there is now less electron density between the two nuclei than there was when you had non-bonding.
同样的,这是反键轨道,你们看到当你有反键轨道的时候,两个原子核中间的电子密度更小了。
So, somewhere in between, the bonds are, we have a range of bonds between ionic on the one hand, and perfectly covalent on the other hand.
因此在中间,这些键,一方面是离子性,另一方面是完美的共价键。
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