The Property Tree library provides a data structure that stores an arbitrarily deeply nested tree of values, indexed at each level by some key.

Property Tree库提供了一种数据结构，用于保存任意嵌套层数的由值组成的树，每一层以某个键值来索引。

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More income comes from a gravel pit, a tree farm and leased property at the side of the lake.

ECONOMIST: Endangered species

Many said they were angry that the students, dubbed the Jena 6, were being treated more harshly than three white students who hung nooses from an oak tree on Jena High School property.

CNN: Mychal Bell of 'Jena 6' released on bail

"Several tree limbs were down across the property and power was lost for nearly 30 minutes, " it said.

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