第1个回答 2022-05-26
Do you know something about tree rings(年轮)? Do you know they can tell us what the weather was like, sometimes even hundreds of years ago? A tree will grow well in a climate(气候)with lots of sunshine and rainfall (雨量). And little sunshine or rainfall will limit (限制) the growth of a tree. We can see the change of climate by studying the tree rings. For example, to find out the weather of' ten years ago, count the rings of a tree from the outside to the inside. If the tenth ring is far from the eleventh ring, then we' re sure that it was sunny and rainy most of that year. If it is near to the eleventh ring, then the climate that year was bad. Tree rings are important not only for studying the history of weather but also for studying the history of man. Many centuries ago there lived a lot of people at a place in New Mexico. But now you can find only sand there- no trees and no people. What happened? A scientist studied the rings of dead trees there. He found that the people had to leave because they had cut down all the trees to make fires and buildings. As all the trees had gone, the people there had to move.
你知道树的年轮吗?你知道他们可以告诉我们什么的天气怎么样,有时甚至是几百年以前的事了?一树将在一个良好生长的阳光和雨水很多气候.和小阳光或降雨将限制了树木的生长.我们可以看到通过研究树木年轮气候变化.例如,要找出十年前的天气,计数从外面一棵树的戒指里面.如果十环远离十一环,则我们相信,这是晴天和阴雨当年最.如果是靠近十一环,则是这一年的气候恶劣.树木年轮不仅是重要的研究历史,但天气也为研究人类的历史.许多世纪以前,有一个住在新墨西哥州举行了很多人.但现在你可以发现那里只有沙子,没有树木,没有人.发生了什么事?科学家研究了环有死树.他发现,人们不得不离开,因为他们砍伐了所有的树木和建筑物,使大火.由于所有的树木已经走了,那里的人不得不搬迁.————————摘自百度知道