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make a decision作决定
例句：The government will discuss these matters today and make a decision shortly.
政府今天要讨论这些事情，然后即刻作出决定。
2.The arrest under president’s criticism of the police set off a heated debate on race which Mr. Obama says show the sensitivity of black people to such incidents.
set off 引起
例句：This question set off a fierce debate.
就这个问题掀起了一场激烈的辩论。
3.Because this has been ratcheting up, and I obviously helped to contribute ratcheting it up.
ratchet up推进，扩大
例句：electricity prices will ratchet up this year
今年电价将升高
4.I want to make clear that in my choice of words, I think I unfortunately gave an impression that I was maligning the Cambridge Police Department or Sergeant Crowley specifically.
make clear that明确表示
例句：We have make it clear that agriculture is the foundation of the national economy.
我们已经讲明农业是国民经济的基础。