La Nina is a natural 3-6-year cycle, and the cold stretch of a periodic thermal oscillation in ocean surface temperatures that occurs throughout the tropical Pacific.
拉尼娜每隔3到6年发生一次，太平洋热带地区海水温度会随之发生周期性的异常变冷。
During a cold stretch that had many Canadians scurrying indoors, a researcher known as "Professor Popsicle" has found humans can successfully spend days on end in the bitter cold.
长期的寒冷迫使许多加拿大人在屋子里跑来跑去，而一位被称为“冰棒教授”的研究者在此期间发现人类可以在严寒中成功坚持生存很长时间。
During a cold stretch that had many Canadians scurrying indoors, a researcher known as "Professor Popsicle" has found humans can successfully spend days on end in the bitter cold.
长期的寒冷迫使许多加拿大人在屋子里跑来跑去，而一位被称为“冰棒教授”的者期间人类可以在严寒中生存很长。
This amazing picture shows a rare phenomenon called a roll cloud which tend to form ahead of a cold front and can stretch for miles.
这张惊人的图片展示了一种叫做云卷的罕见现象，它往往形成于冷锋之前，并能延伸数英里远。
This amazing picture shows a rare phenomenon called a roll cloud which tend to form ahead of a cold front and can stretch for miles.
这张惊人的图片展示了一种叫做云卷的罕见现象，它往往形成于冷锋之前，并能延伸数英里远。
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