12.05 cornerstone

1) 翻译：人工智能技术正在成为日常生活中重要的一部分。

AI technology is becoming the cornerstone of our daily lives.

2) Economic independence is the cornerstone of the personal independence.

3) building block

If you describe something as a building block of something, you mean it is one of the separate parts that combine to make that thing.

foundation

bedrock

The bedrock of something is the principles, ideas, or facts on which it is based.