The experiment of new lost circulation simulator has a good repeatability. The formula acquired by experiment was applied directly to the lost circulation control in field.

新型堵漏仪实验结果重复性好，所形成的配方可直接应用于现场堵漏作业。

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It is very important to measure the volume change of mud in mud pit for the safe drilling, the control of well blowout and the lost of circulation.

测量泥浆池中泥浆体积的变化对于安全钻井，控制井涌、井漏具有十分重要的意义。

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And if central bankers sought to control money, however defined, by targeting the monetary base cash in circulation and commercial-bank reserves held with the central bank they lost control of the short-term interest rate, which might move erratically and damage the economy.

ECONOMIST: Economics focus