that quickly 是什么用法 - 柯帕斯英语网

2 that quickly 是什么用法

The budget presented to Germany’s coalition cabinet on March 16th was accompanied by a proposed law creating a special defence fund worth €100bn ($110bn). This will be used to boost German defence spending from around 1.5% of gdp to at least 2%, the level that nato members are supposed to meet but Germany has consistently missed. The cash should be enough to bridge the gap for the next four or five years if officials decide to spend it that quickly. It would have been better to increase the regular defence budget, rather than relying on a one-off top-up fund, so that the change would be harder to reverse. But still, Germany will for now become the world’s third-biggest military spender.

如何理解这里的decide to spend it that quickly？有it就可以了，为什么还需要一个that？