The Salk Institute has two structures that surround a marble garden area or courtyard.

VOA: special.2009.12.13

And what it turns out is experimental evidence tells us that these two structures are equivalent.

而实验结果也告诉我们,这两种结构是等价的。

麻省理工公开课 - 化学原理课程节选

So, we can also get into a case where we have similar values in terms of absolute values of formal charge between two different molecules we're deciding between in their Lewis structures.

我们还可能遇到另外一种情况,那就是在我们需要进行,选择的两种路易斯结构中,形式电荷具有相似的绝对值。

麻省理工公开课 - 化学原理课程节选

There need to be two separate support structures for these two types (SME and IDE) that have different support personnel and different programs.

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The building activity reflected increased work on structures with two or more units.

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Why that is so lies buried in the different crystalline structures of the two materials.

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