Compared with diolefine rubber,EPDM has less double bond.
与二烯烃橡胶相比,EPDM的双键很少。
| 单词 | double bonds |
| 例句 |
英语例句库
Compared with diolefine rubber,EPDM has less double bond. 与二烯烃橡胶相比,EPDM的双键很少。 Ring closing metathesis (RCM) of dienes to cycloalkene provides an important tool for C-C double bond formation catalyzed by metal carbene. 关环转换反应是形成碳碳双键的重要反应之一,即双烯化合物在金属碳烯催化下关环得到环烯类化合物。 Ethyl phenylacrylate intermediate bringing a double bond was introduced first,which is subsequently transformed into triketone and then DCM was obtained with high purity. 采用具有烯烃骨架的β-苯基丙烯酸酯为中间体先引入双键,再经过三酮合环制备乙烯基吡喃。 Results indicate interestingly that the double bond of GMA polymerized with polystyryl carbanion and the molar ratio of epoxy end group and polystyrene oligomer can be adjusted. 在GMA与聚苯乙烯阴离子反应的过程中，GMA在活性种的终端发生了聚合，所得产物中环氧端基与聚合产物的摩尔比可根据需要进行调节。 Interestingly, in spite of its instability, the O3 molecule can be stabilized as an ozonide between the double bonds of a monounsaturated fatty acid such as oleic acid. 有趣的是，尽管不稳定，超氧O3分子却能以双键结合安定于像油酸那样的单元不饱和脂肪酸形成超氧O3化物。 声明：以上例句、词性分类均由互联网资源自动生成，部分未经过人工审核，其表达内容亦不代表本软件的观点；若发现问题，欢迎向我们指正。
原声例句
经济学人（汇总） These are of two varieties, known as single and double bonds. 化学键有两种，单键和双键。 Scishow 精选系列 Each double bond means two fewer hydrogens. 每个双链意味着少两个氢原子。 Scishow 精选系列 The molecule itself is a diterpene, a kind of carbon-and-hydrogen molecule with lots of double bonds. 这个分子本身是二萜，是一种有很多双键的碳氢分子。 双语版 TED-Ed 演讲精选 Unsaturated fats, on the other hand, contain double bonds that create an irregular kink in their structure. 相反，非饱和以双键以双键不规则地连接在一起。 Scishow 精选系列 Corn oil, for example, is made up of lipids with lots of double bonds, also known as polyunsaturated fats. 例如，玉米油是由许多双键的脂类组成的，这类物质也叫作多元不饱和脂肪。 Asap SCIENCE 精选 The carbons double bond with each other so that fewer hydrogen can fit and we call this unsaturated fat. 每个碳原子之间都有双键连接，这样氢很难嵌入碳原子之间。我们称这种脂肪为不饱和脂肪。 Scishow 精选系列 Single bonds can rotate around their axis no problem, but double bonds lock a structure into place. 单链可以轻易地绕轴转动，但双链将结构固定于特定的位置。 Scishow 精选系列 In nature, a double bond in a fat chain almost always locks it into a kink. 事实上，脂肪链中的双链几乎都是将链固定成一个结。 Scishow 精选系列 And that double bond can either lock the chain into a kink or lock it straight. 而且双链可以将链固定成一个结或是直线。 可汗学院：生物化学 So we have a polarized double bond situation here. 所以我们这里有一个两极分化的双键情况。 Crash Course 综合篇 Remember there are two types of bonds in double bonds. 请记住， 双键中有两种类型的键。 Scishow 精选系列 Those rings and double bonds don't give PET much flexibility, so the polymers tend to pack closely together, and are harder to melt. 那些环和双键无法给 PET 太多的灵活性，所以聚合物会被紧密地聚合在一起，更难被熔化。 可汗学院：生物化学 And so we have four electrons in this double bond between the carbon and the oxygen. 所以我们在碳和氧之间的双键中有四个电子。 Crash Course 综合篇 It's not a double bond, it's a one-and-a-half bond. 这不是双键， 而是一个半键。 Crash Course 综合篇 It contains 3 double bonds, so that each carbon has a total of 4 bonds. 它包含3个双键， 因此每个碳共有4个键。 化学 Crash Course Acetone, with that big hunk and double bond is nice and polar, so it's water soluble; great for cleaning stuff. 丙酮，带有大块和双键， 是很好的极性，所以它是水溶性的； 非常适合清洁东西。 Crash Course 综合篇 Those double bonds could just as easily be in these positions and they are in those positions -- sort of. 那些双键可以很容易地处于这些位置并且它们处于那些位置 - 有点。 Crash Course 综合篇 You recognize the -alkane ending there, so there must be no double bonds, right? 你认出了 -alkane 在那里结束， 所以一定没有双键， 对吧？ 化学 Crash Course If they've got a double bond, we call them alkenes, and those with triple bonds are alkynes. 如果它们有双键，我们称它们为烯烃，而那些有三键的是炔烃。 化学 Crash Course The point is that double or triple bonds can be usually opened up fairly easily. 关键是双键或三键通常可以很容易地打开。 |
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