Each class loader also keeps a reference to a parent class loader, defining a tree of class loaders with the bootstrap loader at the root.

每个类装入器还保留对父类装入器的引用，这样就定义了类装入器树，树根为引导程序装入器。

youdao

Identify an inheritance tree UML class diagram.

识别一个uml类图的继承树。

youdao

Project: Configure a complex class tree.

项目：配置复杂的类树。

youdao

Yarnall also has her own network of "wood scouts, " who call whenever they find a world-class tree.

FORBES: Trees with souls

This inviolate "death and taxes" truth sustained me--a peace-loving granny, a tree-hugging liberal--through 64 years of protected, upper-middle-class subsistence.

NEWSWEEK: Culture