而这个问题在人口密集的中国更加突出，与之相反，北美的加拿大则是最容易从家到工作场所。
The problem seems to be especially acute in crowded China, whereas North Americans-especially Canadians-find it easiest to get from home to work.
但直到今天，这篇论文仍然被来自世界各地的研究人员引用，从太平洋彼岸的美国、加拿大到中国、日本，以及地中海区域的以色列。
But till today, this essay is still researchers from around the world reference, from across the Pacific, the United States Canada to China, Japan, and the Mediterranean region of Israel.
中国每年从加拿大进口3到4百万吨油菜籽。
China imports 3 million to 4 million tonnes of Canadian canola seed annually.
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