您要查找的是不是：
- single polynucleotide chain 同一多核苷酸链
- The polynucleotide chain is helical. 多核苷酸键是螺旋形的。
- The polynucleotide chain is helical 多核苷酸键是螺旋形的。
- The ribose sugar and phosphate group forms the backbone of the polynucleotide chain while a series of base connected to the backbone bond the two chains, where A bonds with T, G bonds with C. 而糖类和磷酸分子形成了长链骨架，两条长链是由一系列的碱基相连接，且A和T配对，G和C配对。
- DNA ligase An enzyme, used in DNA REPLICATION and the in vitro synthesis of DNA, that joins together segments of newly synthesized polynucleotide chains using energy from ATP. DNA连接酶：是一种在DNA复制或DNA晶体合成中起作用的酶，它能够将新合成的DNA片段连接在一起，反应中需要ATP提供能量。
- DNA ligase An enzyme, used in DNA REPLICATION and the in vitro synthesis of DNA, that joins together segments of newly synthesized polynucleotide chains using energy from ATP. See replication. DNA连接酶：是一种在DNA复制或DNA晶体合成中起作用的酶，它能够将新合成的DNA片段连接在一起，反应中需要ATP提供能量。参见replication.
- Polynucleotide chains and Base pairs 多聚核苷酸链和双基座
- It is as if a single unimportant event set up a chain of reactions. 仿佛一件小事引起了一连串连锁反应似的。
- The letter was written on a single sheet of paper. 这封信只用一张纸写成。
- One single, second class, to winchester, please. 买一张去温撤斯特单程二等票。
- He got over the stream with a single leap. 他一跃就跳过了小溪。
- The bridge crosses the river in a single span. 河上那座桥是单跨桥。
- Do you want a single or a return ticket? 你要单程票还是往返票?
- Is the material single width or double width? 这幅料子是单幅的还是双幅的？
- I have had to work for every single penny I earned. 我挣的每一便士都是辛苦工作得来的。
- The huntsman fired a single shot at the lion and settled its hash. 猎人朝那只狮子开了一枪，把它打死了。
- Five twenties and ten single, please. 请给我5张20元的和10张1元的。
- She wore a single orchid on her evening dress. 她在晚礼服上缀着一朵兰花。
- Up to yesterday, I thought he was single. 直到昨天，我一直以为他是独身。
- Can you let me have a room with two single bed? 可以给我一间两张单人床的房间吗？
