We've also done one on the 18-inch Bloodhound model, but it was pressure-fed; it wasn't done using our new pump and that's the point about this upcoming test.

我们还在18英寸的侦探犬模型上进行了一次测试，不过它无法承受其压力；必须有我们的新泵才能进行测试，这就是即将进行的测试的关键。

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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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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.

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

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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.

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