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The study of formal languages and automata is essential for understanding the theoretical underpinnings of computer science.

煤炭企業(yè)在追求經(jīng)濟(jì)效益的同時必須履行社會責(zé)任。

I believe in second chances because I know what it's like to need one.

文化自信是品牌自信的基礎(chǔ)。