I need help understanding this paragraph from The Economist:
His grim prediction is based on the “impossible trinity”: an economy cannot control domestic liquidity and manage its exchange rate if its capital account is open. If it holds down its currency, foreign-exchange inflows will boost money growth. The central bank can try to “sterilise” the impact of bigger reserves by selling securities to mop up the excess liquidity. The snag is that bond sales will tend to push up interest rates and so attract yet more capital inflows. Mr Roubini believes that the room for sterilisation by Asian central banks is severely limited and so rising reserves mean even greater excess liquidity.