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- Dihydroflavonol is another kind of flavone in which 2,3-position is a single bond and 3-position is substituted by hydroxyl. 二氢黄酮醇是指2,3位为单键,3位有一羟基取代的一类黄酮化合物,研究表明此类化合物很多都具有很好的抗氧化、保肝护肝、降血脂、抗肿瘤等药理活性。
- The carbon-fluorine single bond is among the strongest known and results in PFA being virtually chemically insert and nonwettable by fluids such as water. 氟化碳单键间的结合力很强使得PFA(可溶性聚四氟乙烯)塑料不会被流体如水所介入和湿润。
- Hoses incorporating single bonding wires between couplings are not acceptable. 不允许采用耦合之间为单连接电线结构的软管。
- Because compounds of this type contain only single bonds they are often referred to as saturated hydrocarbons. 因为这类化合物只含有单键,所以它们常被称为饱和烃。
- By contrast,the conformational properties of a polymer are determined by rotations about single bonds. 与其相反的,一个聚合物的构象性质是由单键的轮换决定的。
- Estimation of the Fraction of Ionic Character for Single Bond in an AB Molecule AB型化合物单键离子性百分数的量度
- The Shear Bond Strength of Single Bond to Enamel during Orthodontic Treatment 封闭牙釉质表面的抗剪粘接强度研究
- 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?
- One of four offspring born in a single birth. 四胞胎之一一胎出生的四个孩子中的一个