If we're all prepared to recycle paper, thousands of trees could be saved every day.
如果纸能被循环利用,那么每天千千万万的树木就可得以挽救。
The search proved difficult, for the puma was often observed at one place in the morning and at another place twenty miles away in the evening.
事实上搜寻工作很困难,因为常常是早晨在甲地发现那只美洲狮,晚上却在20英里外的乙地发现它的踪迹。