The prices are going up while the purchase ability of the people is declining.

物价持续上涨，然而人民的购买力在逐步下降。

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The key to avoiding any privacy or big brother issues is informed consent before purchase and the ability to revoke consent after purchase.

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Still, the very ability to purchase your way through a survival-action title is off-putting.

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As of January 1st 2012, the Treasury Department eliminated the ability to purchase paper saving bonds.

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