By counting tree rings in some of the logs, the team found the trees were at least 75 years old when they were entombed.

看一些木头的年轮，科研小组发现，那些树被掩埋的时候至少有75年的树龄。

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You can tell the age of a tree by counting its rings, but these records of trees' life really say a lot more.

你可以通过数年轮来判断树木的年龄，但是作为树木生命的记载，年轮能说明的东西远不止于此。

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There is a 1,700-year-old tea tree still living in southern China which is more than 100 feet tall and counting.

在中国南部仍然生长着一棵1,700岁的茶树，高100多英尺并在继续长高。

《柯林斯英汉双解大词典》

When you get--this is Rituparna, counting the leaves on a tree-- you can estimate, from a sample, the population expected values.

如果你...像数叶子的睿都巴若那一样,只有部分样本的话,你可以来估计总体均值

耶鲁公开课 - 金融市场课程节选

So Rituparna tries to prove to him his abilities and he says, see that tree there, I can estimate how many leaves there are on that tree by counting leaves on one branch.

所以睿都巴若那就试图证明自己的能力,他说,看那边的树,我只需数一根枝杈上的叶子,就能估算出树上叶子的总数

耶鲁公开课 - 金融市场课程节选

With the help of many PTA volunteers, we installed a large green house, water garden with fish, bridge, butterfly garden, weather station, sundial, archaeology digging area for fossils and minerals, tree stumps for counting the rings, benches for an outdoor classroom and reading area, and over 60 different plants, shrubs and trees.

WHITEHOUSE: Parental Involvement in Schools: The Key to Our Children's Success | The White House

To find out how warm the earth was before that, climatologists have had to resort to indirect methods, such as measuring tree-rings, or counting the different isotopes of oxygen in layers of polar ice.

ECONOMIST: The hole story of global warming