keystone

n.

重点；要旨；基本原理；拱心石

复数：keystones

1. The arch is furnished with a keystone.
   这个拱顶是用拱顶石装饰的。
2. The keystone to any marriage is one word: "WE".
   任何婚姻的基石只有两个字:“我们”。
3. Belief in a life after death is the keystone of her religious faith.
   她的宗教信仰的基础是相信死后有来生。
4. The second part is the keystone of this article.
   这是论文的重点论述部分。
5. The essentiality of fund and financing is the keystone of expatiation.
   资金和资金筹集的重要性是阐释的重点。

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