That DNA bases attract is not a surprise,because base pairs are complementary like right-and left-handed gloves: adenine binds with thymine, cytosine with guanine.

• DNA碱基对有吸引力并不令人吃惊，因为碱基对就像左和右手套一样是互补的：腺嘌呤约束胸腺嘧啶，胞嘧啶约束应鸟嘌呤。