截止至今天正常交易收盘，美铝股价自今年以来已下跌33%，为30家道指公司中跌幅最大。
The shares dropped 33 percent this year through the close of regular trading today, the largest decline in the 30-member Dow.
卡鲁那指出，次贷危机发生至今已经六个多月了，信贷市场依然没有恢复正常运作。
Caruana says more than six months into the crisis, credit markets are still not functioning normally.
至今仍不清楚为什么饮酒能预防痴呆病，也许酒具有保持大脑血液正常流动的特性。
It's not clear why drinking guards against dementia, though it may be alcohol's capacity to maintain healthy blood flow to the brain.
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