2020年7月16日,星期四,加拿大阿尔伯塔省的油菜地附近的采油机。短短几十年间,油菜已经成为世界上最重要的油料作物之一,也是加拿大农民最赚钱的商品。THE CANADIAN PRESS/Jeff McIntosh

Pumpjacks draw oil out of the ground in a canola field near Olds, Alta., Thursday, July 16, 2020. In just a few decades, canola has become one of the world's most important oilseed crops and the most profitable commodity for Canadian farmers.THE CANADIAN PRESS/Jeff McIntosh
加拿大阿尔伯塔省的油菜地附近的采油机
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