BBC news 2009-06-18 加文本

这句话是疑问句，还原成正常顺序就容易理解了：President Obama’s medicine is what America really needs。what America really needs是表语从句。

2.Banks will have to keep more money in reserve in case things go wrong.

in case万一

例句：This is my new home address in case you want to send me something.
      这是我新家的地址，万一你想给我邮寄东西呢。

3.Firms did not have strong risk management systems in place.

in place在适当的位置, 适当

例句：The artificial teeth could be held in place by tying them to the remaining solid teeth.
      可以将假牙固定到其他的好牙上面，使其保持在固定的位置上。

4.The last thing in the world that the market needs is another regulator.

The last thing最不需要的，最后一个。比如：

例句：The last person I will turn to for help is Ellen.
      我绝不会找Ellen帮忙。

5. I think they should take the existing regulation structure, and they should figure out where there are gaps and I think they should close those gaps before they had another agency to the regret.

figure out合计为, 计算出, 明白

例句：I simply couldn't figure out his intention.
      我始终揣摩不透他的用意。