| 1. | The other two, thymine and cytosine, are single ring structures called pyrimidines .
另两个为胸腺嘧啶和胞嘧啶，即称为嘧啶的单环结构。 |
| 2. | Then they timed the reactions that caused the new thymine bonds to form
然后他们记录了产生新的胸腺嘧啶键形成的反应。 |
| 3. | There are four types of nucleic acid , adenine , cytosine , guanine , and thymine *
有四种类型的核酸? ?腺嘌呤、胞核嘧啶、鸟嘌呤、胸腺嘧啶。 |
| 4. | It is important in the growth and reproduction of cells , participating in the synthesis of purines and thymine
在细胞生长和再生中也很重要，参与了嘌呤和嘧啶的合成。 |
| 5. | Either two thymine bases are lined up in just the right way to bond when the u 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。 |
| 6. | 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。 |
| 7. | An adenine on one chain is always matched with a thymine * on the other chain , and a guanine with a cytosine
在一个链上一个腺嘌呤分子总是与另一个链上的一个胸腺嘧啶相匹配，而一个鸟嘌呤总是与一个胞核嘧啶分子相匹配。 |
| 8. | Normal dna consists of four bases - adenine , cytosine , guanine and thymine ( known as a , c , g , t ) - molecules that spell out the genetic code in pairs
正常dna由四种碱基组成腺嘌呤、胞嘧啶、鸟嘌呤、胸腺嘧啶，这些分子以成对的方式组成基因的密码。 |
| 9. | That means that whether or not two thymine bases are damaged depends on the position of the dna during the extremely brief time required for it to absorb u light
这就意味者无论两个胸腺嘧啶是否受到损伤都要依赖于在吸收紫外线极端短的时间内dna的位置。 |
| 10. | That means that whether or not two thymine bases are damaged depends on the position of the dna during the extremely brief time required for it to absorb uv light
这就意味者无论两个胸腺嘧啶是否受到损伤都要依赖于在吸收紫外线极端短的时间内dna的位置。 |
