北极地区气候寒冷,即使在一年中较温暖的季节,气温也常常在0℃以下。但是,那里有不少植物能在冰天雪地中开花。更令人感到吃惊的是:许多植物花朵的温度总比周围的气温稍高。80年代,三位瑞典植物学家到北极地区考察时发现,大部分北极植物的花朵都有向阳的本领,与向日葵相似,能随太阳在天空中 Arctic climate is cold, even in the warmer seasons, the temperature is often below 0 ℃. However, there are many plants that bloom in the snow and ice. Even more surprising is that many plant flowers are always at a slightly higher temperature than the surrounding area. In the 1980s, when three Swedish botanists visited the Arctic, they found that most of the Arctic plants had the sunny ability, and similar to sunflowers, they could follow the sun in the sky