The vote was seen as a major setback for Mr.Topolanek as it came just days before a planned visit by United States President Barack Obama and midway through the rotation of the Czech Republic's European Union presidency.
VOA: standard.2009.03.25
The face there, if you have seen him before, you will recognize as Yeats's.
实际上,如果你见过他,你会认出这是叶芝。
So the result is we can combine all of these as a single differential, and just like we've seen before, what that suggests is that we define another new quantity given by this expression.
结果就是我们能把所有的结果,整理成一个单一的微分,就像我们前面看到的一样,这说明我们可以利用这个式子,定义一个新的物理量。
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