Pelosi has faced opposition from fiscally-conservative Democrats still nervous about the longer-term cost of the legislation,and opposition from some her in party who assert that language in the measure does not go far enough to ensure a continuing ban on the use of federal funds for abortion.

VOA: standard.2010.03.19

Because we know as we go to infinity, even though the density gets smaller and smaller and smaller, we still have electron density very far away from the nucleus.

因为我们知道即使到了无穷远处，尽管电子密度会变得非常非常非常小，但我们仍然有一定的电子密度，无论离原子核多远。

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