四分之一个世纪过去，这座城市变的更为庞大：它在20世纪90年代在Broadgate东部几英里远的金丝雀码头建立了第二个金融区。
A quarter of a century on, the City is far bigger: it established a second cluster in the early 1990s at Canary Wharf, a few miles east of Broadgate.
在第二部分，我们采用第一部分所选的变分波函数和得到的束缚能进一步计算了类氢杂质体系的光致电离截面。
In the second part, using the wave function and binding energy obtained from the first part, the photoionization cross-section of the impurity is calculated.
再得到与之对应的各类变分原理，界限定理，第二阶段问题的边界积分方程。
Then correspondently, we obtain the specific variational principles, bounded theorems, and boundary integral equations of the second stage problems.
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