重点讲解：
1. under control 得到控制；
Our financial problem seems to be under control now.
目前，我们的财政问题好像得到了控制。
2. due to 由于；因为；
He was late due to the storm.
由于暴风雨，他迟到了。
3. at the expense of 以…为代价；
They have built their economies at the expense of the other nations of the world.
他们以损害别国利益的办法发展他们的经济。
4. go down （价格、水平或数量）下降，下跌；
The fact of the matter is, bonds and paper money will inevitably go down and gold must go up!
事情的真相是债券和纸币将不可避免的下降，而黄金的价格必定会升高。