Firstly, the static and dynamic mathematic model of the Liquid Propellant Rocket Engine of pressure-fed providing system was established in centralized parameter method.

首先采用集中参数法，建立了挤压式供应系统的液体火箭发动机各部件的静态及动态数学模型。

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Inside the Fed, the pressure is also for tighter policy.

而在美联储内部，也存在着紧缩政策的压力。

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Look at the sources of inflationary pressure and it is hard to see the Fed dropping its guard.

观察通胀压力的来源，很难看到联储又放松警惕的迹象。

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And by putting downward pressure on long-term bond yields, it may require the Fed to raise short-term interest rates more aggressively to cool down the economy.

ECONOMIST: Coping with surpluses

On the one hand, the Fed has to be feeling pressure relative to their ever-expanding balance sheet that has swelled to disturbing levels.

FORBES: Investing After The End Of QE2

Under the policies, the Federal Reserve has purchased large volumes of financial assets, and the increase in demand for these assets from the Fed has lowered long-term interest rates and put upward pressure on the prices of stocks and bonds.

CNN: What does the rising Dow mean?