在大致可以比较的农业地区，最好和最差生产者之间巨大的差异表明了有改善的余地。 东欧和西欧适合种植小麦。
The huge gap between the best and worst producers in roughly comparable farming areas shows the scope for improvements.
目的：比较广州地区城乡人群心电图差异并分析其可能的原因。
Objective: To compare the electrocardiogram between urban and rural populations in Guangzhou district and explore its possible causes.
和其他部门一样，这些差异使得中国的种植业生产具有不同的地区比较优势。
Those differences constitute the bases of regional comparative advantages in grain production, as well as in other sectors.
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