通常的识别系统只是执行了从输入数据空间到识别结果空间的单向映射，可以看作为一种开环识别系统；

The conventional recognition system may be regarded as an open loop recognition system, which only executes a mono-direction mapping from input data space to recognition result space.

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这是四个极性键按空间对称聚集的结果。

This is the result of the four polar bonds clustering symmetrically in space.

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研究人员分析了53对父母及其子女在家中的日常活动的录像，在孩子54个月大时接受评估，结果发现在26至46个月大时玩拼图的孩子拥有更好的空间技能。

The researchers analyzed video recordings of 53 child-parent pairs during everyday activities at home and found children who play with puzzles between 26 and 46 months of age have better spatial skills when assessed at 54 months of age.

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And so the balance of the attractive term and the repulsive term eventually leads us to this situation where we have the equilibrium spacing.

在吸引力,和排斥的共同作用下,得到这种结果,即空间上的平衡。

麻省理工公开课 - 固态化学导论课程节选

It is an aggregate of four polar bonds, but they are symmetry arranged in space.

这是四个极性键，按空间对称聚集的结果。

麻省理工公开课 - 固态化学导论课程节选

We want a relationship in p-V space, not in T-V space. So we're going to have to do something about that. But first, it turns out that now we have this R over Cv.

我们想要p-V空间中的结果，而不是T-V空间中的,因此需要做一些变换，先来看现在的关系，它跟R/Cv有关。

麻省理工公开课 - 热力学与动力学课程节选