zero in on an infection or injury

zero in on an infection or injury zero in on all possibilities it's quite cold in winter in xi'an.the temperature often falls b___ zero 关于宏观经济的一道题,Consider an economy in which the interest rate is zero.Comment on the effectiveness of fiscal and monetary policy in this particular case.Use a diagram to illustrate your answer. 宏观经济学,关于monetary policy and interest rate,大哥大姐们,急.Consider an economy in which the interest rate is zero.Comment on the effectiveness of monetary policy in this particular case... The goal of targeting is to zero in on that 20 percent.翻译~ to zero in on为么意思是集中精力于..请举例句 翻译：他在演讲时把注意力集中在内容上.(zero in on) infect是什么意思? There is a o in zero.这里的0是元音字母,前面加a还是an? @Zero On all things in life ( ) there is unexpressed disagreement,improvement is zero. 括号中为什么是 ...On all things in life ( ) there is unexpressed disagreement,improvement is zero. 括号中为什么是 where 啊 谁能说得详细点 谢谢 They did Zero Impacton the Earth 求教：the zero lower bound on Interest Make sure that the throttle control lever of the engine 1(2) is in the idle stop position (zero on the graduated sector).翻译zero on the graduated sector 请问:express an interest in/on sth? we ofter go on an( ) in spring there's next to zero And honestly,there's next to zero space or daylight between Canada's thinking on what should happen in Afghanistan 请翻译一下这句话