The rules of base pairing dictate that adenine always pairs with thymine, and cytosine always pairs with guanine.

碱基配对规则规定腺嘌呤总是与胸腺嘧啶配对，胞嘧啶总是与鸟嘌呤配对。

This complementary base pairing allows DNA to replicate precisely, ensuring the faithful transmission of genetic information from one generation to the next.

这种互补的碱基配对使 DNA 能够精确复制，确保遗传信息从一代忠实地传递到下一代。