We can just design our structures including DAMS to withstand severe seismic shaking.
但是我们可以设计包括大坝在内的建筑物,使它们可以承受严重的地震震动。
The environment advantage refers to surrounding terrains of our structures. Whether there are deep valleys or large rivers that surround our structures.
地利,就是指我方工事修筑在险峻的地势之上,有深川、大河作天然屏障。
And the last thing we do for any of our structures to check them and figure out are these valid or not valid, are these good Lewis structures is to check the formal charge.
而为了检验任何一个结构是否有效,看它们是不是好的路易斯结构,我们要做的最后一件事就是检查形式电荷。
And the last thing we do for any of our structures to check them and figure out are these valid or not valid, are these good Lewis structures is to check the formal charge.
而为了检验任何一个结构是否有效,看它们是不是好的路易斯结构,我们要做的最后一件事就是检查形式电荷。
So in terms of remaining valence electrons we have 12, so we can finish off each of our Lewis structures, so that's our first structure there, and our second structure there.
那么关于剩下的价电子,我们有十二个,因此我们可以完成这两个路易斯结构了,那么这是我们的第一个结构,而那是我们的第二个结构。
For thinkers like Tocqueville for example regimes are embedded in the deep structures of human history that have determined over long centuries the shape of our political institutions and the way we think about them.
举例来说,对于像托克维尔之类的思想家而言,政体内嵌于人类历史的结构深处,许多世纪以来决定了,我们政治机构的形态,及我们对它们的看法。
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