他还说：“土豆是最重要的作物之一，在人类消费中占第五位，在全球作物产量中居第四位。”
He added: 'The potato is one of the most important crops, ranking fifth in terms of human consumption and fourth in worldwide productions.'
最近几周阿森纳队已名居英超联赛积分榜第七位，比居第四位的纽卡斯尔联队低6分，比曼·切斯特联队低12分。
Arsenal have climbed the Premier League table in recent weeks and now sit in seventh place - six points behind fourth-placed Newcastle and 12 adrift of early pacesetters Manchester City.
因为COPD是一种进行性疾病，如果得不到治疗，是不会延缓其加重的；也因为它是美国居前第四位的死亡原因，所以尽早发现非常关键。
And because COPD is a progressive disease that can't be slowed without treatment — and because it's the fourth leading cause of death in the U.S. — it's critical to catch it as soon as possible.
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