树木的年轮

Presently research mainly concentrates on the tree ring in the annual ring width, the annual ring density, etc.

在以往的研究中，对树木年轮的研究主要集中在对年轮宽度、年轮密度等几个指标的量测与分析上。

Cai Junjie: When eyas's growth wing feather's plentiful, trees' growth ten annual ring's increase, youth's growth is bodily and the wisdom jointing!

蔡俊杰：雏鹰的生长时翅羽的丰满，树木的成长十年轮的增加，少年的生长是身体与智慧的拔节！

During the study, researchers recorded the width of the tree rings of balsam firs. Each ring marked a year of the tree's growth. A narrow ring indicated that the tree's growth had been suppressed that year. The narrow rings appeared only after wolf populations decreased, allowing a greater number of moose to survive and eat more balsam firs.

研究期间，研究人员记录了香脂冷杉树轮的密度，一个树轮表示树生长了一年，有一圈年轮显示出树木在那一年的生长受到了阻碍，根据树的年轮推断出现阻碍的这一年，正是狼群数量减少，鹿的数量大量繁殖的那一年，鹿比平常吃了更多香脂冷杉。

Schweingruber F H Tree ring,basics and applications of dendrochronology Dordrecht:D.Reidel Publishing Company , 1988,null

吴祥定%邵雪梅中国秦岭地区树木年轮密度对气候响应的初步分析应用气象学报， 1994，2

SFI is a public research institution of national importance, with a comprehensive research programme focusing on biological, ecological, silvicultural and spatial aspects of forests and forested landscape including forest ecology, forest physiology and genetics, forest protection, ecology of forest fauna and hunting, dendrochronology, dendroecology and dendroclimatology, forest inventory, remote sensing and geographic information systems in forestry etc.

该研究所是国家重点研究机构，主要致力于生物学、生态学、造林学和森林空间森林覆盖等领域的研究，其研究范围涉及森林生态学、森林生理学和遗传学、森林保护、森林动物生态学和狩猎、树木年代学、年轮水文学、年轮气候学、森林资源调查、森林遥感和地理信息系统等。

So it is very important to find out the variation regulation of wood ring density in growth process.

解剖树木生长过程木材密度变化规律，研究年轮内密度的变化十分重要。

Counting the layers is one way of assessing how old a stalagmite is.

同树木一样，石笋通常也有能显示其年生长周期的年轮。

The study of tree ring data indicates that the width and the content of trace elements of tree ring variated obviously in the city.

通过运用树木年轮资料对环境要素进行的研究表明，在城市污染条件下，树木年轮宽度和微量元素含量均发生了明显的变异；植物叶片、树皮中某些元素或化合物的含量水平可指示大气污染程度。

Silicified wood say wood wood, because it we now wood of concept, and is like the stone, but it has the appearances of trees, the section has annual rings, like all other biological fossils, silicified wood fossil their try in the ancient legacy of the nature.

硅化木说木不是木，因为它已经不是我们现在概念上的木，而更象是石，然而它却有树木的外形，剖面有年轮，与其他所有的生物化石一样，硅化木化石其勉力所在便是不可再生，纯是大自然的远古遗产。

Like trees, stalagmites are often composed of concentric layers that represent annual growth periods.

同树木一样，石笋通常也有能显示其年生长周期的年轮。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。