By last year, the Yellowstone wolf population had grown to more than 170 wolves.

直到去年，黄石国家公园的狼群数量已经增长至超过170匹。

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By last year, Wall Street traders, bankers and those who deal in real estate generated 21% of the national income, double their share in the 1950s.

截至去年，华尔街交易员、银行家和从事房地产交易的人创造了21%的国民收入，是上世纪50年代的两倍。

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By last year, nearly 40% of US corn was going to produce ethanol.

去年美国有近40%的玉米用于生产乙醇。

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Many merchants,stung by last year's disastrous showing, kept smaller inventories and did not have to slash prices to sell their products.

VOA: standard.2009.12.28

Last year's event was attended by 1,000 plus attendees and it will be an opportunity for you to really mingle and to conclude the course with a look at your and other friends' projects.

去年的活动有1000多人参加,借此机会你们可以互相学习,可以看看朋友的项目,以此作为这个课程的结尾。

哈佛公开课 - 计算机科学课程节选

Last year we had 4% inflation 4% inflation is high by traditional standards.

去年，我们有4%的通货膨胀,用传统标准衡量，4%是很高的了。

耶鲁公开课 - 金融市场课程节选

Meanwhile, Malaysia seems intent on reflating the bubble pricked by last year's regional crisis.

ECONOMIST: Dead Ostrich Bounce

Contempt for politics was stoked by last year's expenses scandal, but it was there before.

ECONOMIST: Britain��s third party may soon be much more than that

By last year, the OASI fund was perilously close to running out of money.

CNN: A Debt-Threatened Dream