foundation
单词辨析：
指某事物的基底部分，一般用单数。也可以指知识、想法等的基础或军事组织的基地。
the base of a mountain/tree
山脚/树根
a military base
军事基地
an air base
空军基地
A good scientific research base ensures the achievement of last year's economic goals.
良好的科研基础保障了去年经济目标的完成。
指支持某事物并构成其发展基础的重要事实、观念、事、物等。
the basis of discussion
讨论的基础
the basis of equality and mutual benefit
平等互利的基础
指建筑物的地基，也可用来表示思想基础或基本原理。
the foundation of a hous
房基
The workers are strengthening the foundation of the bridge.
工人们正在加固大桥的地基。
This theory is built on a foundation of factual knowledge.
这条理论是有事实根据的。
相关例句：
The Princess of Wales laid the foundation stone for the extension to the Cathedral.
威尔士王妃为大教堂的扩建奠基。
The country has a weak economic foundation.
这个国家的（经济）底子薄。
This laid the foundations for later modern economic growth.
这为后来的现代经济发展奠定了基础。●If an event<b>shakes the foundations</b>of a society or a system of beliefs，it causes great uncertainty and makes people question their most deeply held beliefs.动摇根基（或基础）
She dug the foundation with a pick and shovel.
她用镐和平锹挖地基。
The Foundation is holding a dinner at the Museum of American Art in honour of the opening of their new show.
该基金会将在美国艺术博物馆举办宴会，庆祝新展览的开幕。
He is founding director of The Conservation Foundation.
他是自然资源保护基金会的创办负责人。