即它在一个唯一键组合上只会产生一行数据。

That is it only brings in one row of data for a unique key combination.

youdao

要停用粘滞键组合， 请单击“设置”。

To deactivate the key combination for StickyKeys, click Settings.

youdao

这个键组合了多列，唯一地定义一个数据库表的行。

This is a key that combines a number of columns to uniquely define the rows of a database table.

youdao

And the last bond that we have here is a carbon-carbon bond, and this is our last p orbitals that are coming together.

最后一个键是碳碳键，这是最后一个组合的p轨道。

麻省理工公开课 - 化学原理课程节选

So the point is, this balance between energy thatyou could think of as say bond energies in chemical reactions, and entropy that you can think of in terms of disorder, how many different possible combinations or configurations of something wrong, will dictate where the equilibrium lies.

关键在于，这种能量与熵之间的平衡,确定了平衡的条件，在化学中能量涉及键能，而熵和无序有关,即有多少可能的不同组合或者形位，二者的平衡会告诉我们平衡态是什么样子。

麻省理工公开课 - 热力学与动力学课程节选

There's not two bonds, that's one pi bond, and the reason is because it's 2 p orbitals coming together, and remember p orbitals have electron density above and below the axis, so when they come together, it kind of looks like one bonds, but essentially what we have here is one pi bond.

这不是两个键，这是一个π键，因为这是两个2p轨道组合而成的，记住p轨道在键轴之上,和键轴之下都有电子密度，当它们靠近时，这看着很像两个键，但本质上它是一个π键。

麻省理工公开课 - 化学原理课程节选