当食物供给量足够大时，旅鼠过着正常、不受干扰的生活。
When their food supply is sufficiently large, the lemmings live a normal, undisturbed life.
央行对从诸如保险公司这种机构投资者购买进行支付的本身就能够增加广义货币供给量。
That in itself would raise the broad money supply as the central bank pays for its purchases from institutional investors such as insurance companies.
自然规定了水的供给量是固定的。
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