| 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. | Analysis on the ring structure of urban land use in jinan city
济南城市土地利用的圈层结构分析 |
| 3. | Adenine has a purine ring structure
腺嘌呤具有嘌呤环的结构。 |
| 4. | Consanguineous ring structures
同族环形山构造 |
| 5. | Concentric ring structures
同心环形山构造 |
| 6. | Fold appearance skimmers zinc and chromium plating steel locking ring structure line
褶皱外观，镀铬钢闭锁环和压模锌线结构 |
| 7. | Covalent ring structure
共价环状结构 |
| 8. | Here , the group r ranges from a simple hydrogen atom to complex ring structures
基可以是简单的氢原子也可以是复杂的环状结构。 |
| 9. | The resulting 30 - membered ring structure produces an oval projection when viewed parallel to the b axis
沿平行于b轴的方向上生成了一个奇特的30元环结构。 |
| 10. | If you want to see the ringed structure of the mountains , you have to fly to the sky to enjoy them
假如你想看到山体的环形构造，就要飞到高高的天空中才能看得到了。 |
