A new ring is added every year, and thicker rings represent a kind of savings account, when the tree collects more nutrients than it can use.

VOA: standard.2010.04.05

It's a ladder used to ascend a tree, it's a kind of tool of ascent that's a kind of a tool for getting fruit.

这是用来爬上树的梯子，是一种上升的工具,也是用来摘果子的。

耶鲁公开课 - 现代诗歌课程节选

It's a ladder used to ascend a tree, it's a kind of tool of ascent that's a kind of a tool for getting fruit.

这是用来爬上树的梯子，是一种上升的工具,也是用来摘果子的。

耶鲁公开课 - 现代诗歌课程节选