You can tell the ageof 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。
2
Possible nodes on the tree would be age, income level, current number of cars, mariatl status, kids, homeowner, or renter.
这个树上的节点可以是年龄、收入水平、目前拥有的车的数量、婚姻状况、有无孩子、房主还是租户。
3
So, by measuring the ratio of the two isotopes in the rings of trees, and matching the result to the ageof the ring, a history of hurricanes spanning the life of the tree can be reconstructed.