For the polar vortex area on the Northern Hemisphere, in summer the polar vortex boundary withdraw about 30 latitudes than winter.

冬夏季北半球极涡面积的比较发现夏季和冬季相比极涡边界收缩了近30个纬度。

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The true wild roses add up to a few hundred species from the temperate and subtropic zones on the northern hemisphere, including North Africa, Ethiopia, Himalaya and the Philippines.

这是真正野生的玫瑰，可以根据气候不同，从温带到亚热带共分布着几百种野生品种，包括北非，埃塞俄比亚，喜马拉雅山区和菲律宾。

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But the harvest season in the northern hemisphere is being marked by turmoil on global wheat markets.

不过北半球收获季节正在遭遇全球小麦市场动荡。

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The Scarlets probably had different feelings on seeing one of the northern hemisphere's finest attacking full-backs take the field against them, especially with the Ospreys starting to find some fluidity in the backline.

BBC: Scarlets 14-21 Ospreys

But Henry assured them: "I'll continue to give 150 per cent to the Welsh job, " and claimed there would be no conflict of interests if he is asked to take on the biggest role in northern hemisphere rugby.

BBC: News Online

"The stats this year tell us that Chris Paterson is the best goal-kicker in the northern hemisphere currently on 86% but that Phil Godman's number five on 79%, " explained Hadden.

BBC: Scotland drop full-back Paterson