In Alberta people mine and drill for oil, potash, petrol and gas.在亚伯达,人们采矿、打井开采石油 、 碳酸钾 、 汽油和天然气.The plains of Alberta are extremely fertile.艾伯塔平原极其肥沃.In Alberta and Saskatchewan there are many hills where dinosaur bones...
A smallholding in the hills could not support a large family.山间的一小块耕地是不可能养活一大家人的。The soil washed from the hills is silting up the hydroelectric dams.从山上冲刷下来的泥土就要让水电大坝淤塞了。The hills rise green and sheer above the broad riv...