King Abdullah said he has urged the president to focus on the Israeli-Palestinian dispute, saying that is the key to resolving all the other problems in the region.

VOA: standard.2009.04.26

We find--examples of this thought that brain is the key in all places.

我们找到了很多案例来证明,大脑确实是最关键的。

耶鲁公开课 - 死亡课程节选

That is not acceptable. And I will not tolerate it." The president spoke after a lengthy meeting with key cabinet and agency heads involved in all aspects of aviation security and counter-terrorism.

VOA: standard.2010.01.05

Like the Bank of England, the U.S.Federal Reserve has all but exhausted one of its most powerful tools for stimulating the economy -- lowering the key interest rate that banks charge to lend to each other.

VOA: standard.2009.03.18