But what is liquidity, why does it suddenly evaporate and what can central Banks and regulators do to ensure that its ebb and flow does not destabilise economies?

为什么它会突然消失？央行和银行管理者怎么样才能保证它的消长不致于造成经济不稳定呢？

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Indeed, regulators remain concerned about controlling the flow of speculative capital across borders.

事实上，监管机构仍关注于控制投机资金的跨境流动。

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The carrier gas is often store in a steel cylinder with pressure and flow regulators.

载气常常装在带压力和流速调节器的不锈钢瓶里。

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Without tackling the much more controversial issue of who can invest in these companies (the crowdfunding provision), or adding a penny to national debt, regulators will increase the flow of capital from qualified investors to the most productive areas of our economy.

FORBES: A Way Forward For The JOBS Act

But regulators still tend to imagine that power will flow in one direction only: from big plants to small consumers.

ECONOMIST: Charge ahead

It said the Vatican had come a long way, but warned that the Holy See regulators still lacked the power to oversee the flow of money within its borders.

WSJ: Vatican Signs Anti-Money-Laundering Deal With U.S.