In a review study published in 2007 in the journal Ibis, researchers looked through European and NorthAmerican bird journals and other references dating back to the late 19th century.
Should Barack Obama win, he is expected to call for a review of the NorthAmerican Free Trade Agreement, on which Canada depends.
如果奥巴马获胜的话,他将重新审视北美自由贸易协定,而该协定对于加拿大来说不能一日或缺。
3
He said Mr Obama had not proposed renegotiating the NorthAmerican Free-Trade Agreement but wanted to review Labour and environmental standards in the accord.