2. Either two thymine bases are lined up in just the right way to bond when the UV hits, or they're not. 当受到紫外线伤害的时候,胸腺嘧啶或者线性排列以正确的方式形成键或者不产生键。
3. Any of several basic compounds derived from or structurally related to pyrimidine, especially the nucleic acid constituents uracil, cytosine, and thymine. 碱基嘌呤(腺嘌呤和鸟嘌呤)或嘧啶(胸嘧啶、胸腺嘧啶和尿嘧啶)的一种,附着在脱氧核糖核酸或核糖核酸的糖分子上。
英英解释
n.
1. a base found in DNA (but not in RNA) and derived from pyrimidine; pairs with adenine