【用戶】已考上107正式英文老師:

【年級】大二下

【評論內容】Thus in a specific locale or, more accurately, a specific climatic province, tree-ring counts will reflect climatic conditions and variations due to inequalities of climate from year to year. In years with abnormal drought, for example, narrow rings are produced and sometimes no ring at all. In this way a fossil record is imprinted for as long as the wood remains intact. From this pattern a historical template can be constructed to correlate one set of growth rings in one tree with a set of growth rings in another tree or piece of timber...