• He said that the percent ionic character, and this is within a bond, not for a compound, for a covalent bond.

    他提到离子百分数,是指一根键中,并非一个分子中。

    麻省理工公开课 - 固态化学导论课程节选

  • So let's figure out the bond order for our two molecules here that we figured out the electron configuration for.

    让我们看看这里,两个分子的键序是多少。

    麻省理工公开课 - 化学原理课程节选

  • OK, then it says draw a single bond from each surrounding atom to the central atom, and subtract two valence electrons.

    后将中心原子与其相邻原子之间,连上单键,然后减掉2个价电子。

    麻省理工公开课 - 固态化学导论课程节选

  • Now when Black Boy was published there was a war bond advertisement on the back cover of the book.

    当《黑孩子》出版时,战争债券的广告是附在书后的。

    耶鲁公开课 - 1945年后的美国小说课程节选

  • I mean, hypothetically a bond trading at $.60 on the dollar with an 8% coupon, five-year bond that's yielding about 18%.

    我的意思是,假设一种债券以0。60美元进行交易,同时有8%的票息,五年期债券收益率在18%左右。

    耶鲁公开课 - 金融市场课程节选

  • So, there's actually another way to graph it where we can directly graph the dissociation energy or the bond strengths.

    其实,还有另外一种画这个曲线的方式,可以直接画出离解能的大小,或者键的强度。

    麻省理工公开课 - 化学原理课程节选

  • So what we can actually directly compare is the dissociation energy or the bond strength of nitrogen versus hydrogen.

    因此实际上我们可以直接进行比较,对氮分子与氢分子的离解能,或键的强度。

    麻省理工公开课 - 化学原理课程节选

  • And you would find that the bond energy of the heteronuclear molecule was nowhere on the average of the two.

    你将发现,电子相同的分子的总能量,并不是平分的。

    麻省理工公开课 - 固态化学导论课程节选

  • Well, if this bond has completely identically equal sharing of electrons, then this bond will be nonpolar.

    如果一根键连的两个原子,对键上的电子吸引程度是完全等价的,那么这根键是非极性的。

    麻省理工公开课 - 固态化学导论课程节选

  • So, if we take a look at what a single bond is, and let me grab some molecules here.

    如果来我们看一下单键,让我拿个分子。

    麻省理工公开课 - 化学原理课程节选

  • So, we know from our calculation that we can do over here, that this bond is polar.

    我们通过计算都知道,这个键是非极性的。

    麻省理工公开课 - 固态化学导论课程节选

  • And you can go ahead and tell me what you think the bond order is going to be for this molecule.

    你们告诉我你觉得,这个分子的键序应该是怎样的。

    麻省理工公开课 - 化学原理课程节选

  • so you can see that there is going to be two sets in antibonding, three sets in bonding for a net of one, giving us the single bond.

    因此你能看到,反键轨道上有两组,三组成键,得到一组净成键,所以成的是单键。

    麻省理工公开课 - 固态化学导论课程节选

  • What these do is they insure the bond-- they insure the investor against the municipality failing to pay on the bond.

    他们的业务是为市政债券保险,他们确保政府当局,有能力向投资者进行赔付

    耶鲁公开课 - 金融市场课程节选

  • And so both of these lobes together constitute a pi bond.

    上下两片叶一起组成了一根π键。

    麻省理工公开课 - 固态化学导论课程节选

  • So there's not a lot of room in the government bond market or other high-quality bond markets to generate excess returns.

    所以对于政府债券或者优质债券,超额收益的空间不大

    耶鲁公开课 - 金融市场课程节选

  • It's much more relevant to set our zero point energy as the separation of a bond in terms of talking about the reactions that we'll usually be dealing with here.

    更好的是把零点能定在,键断裂的时刻,在讨论化学反应的时候,而我们以后将经常遇到化学反应。

    麻省理工公开课 - 化学原理课程节选

  • He introduced the concept of electronegativity which was a measure, therefore, it is quantitative, of the atom's ability to attract electrons within a covalent bond and developed a scale of electronegativity.

    他引入了电负性这一概念,一个反映着原子在成共价键时吸引电子的能力的数据标度,因此这是数量上的,在共价电子中,电子原子能吸引电子,并发展为一定规模的电负性。

    麻省理工公开课 - 固态化学导论课程节选

  • So, when we think about a bond length, this is going to be the length of our bond here, that makes sense because it's going to want to be at that distance that minimizes the energy.

    因此,当我们考虑一个键的长度的时候,这就应该是我们的键长,这是合理的,因为体系会在核间距达到这一距离时,能量到达最小值。

    麻省理工公开课 - 化学原理课程节选

  • So, for example, down here I wrote that it was n 2 and that it was h 2, but when I re-wrote the molecules up here, you saw that it's an h h single bond where it's a nitrogen-nitrogen triple bond.

    比如,在这下面我写的是氮分子2,而这个是氢分子,但我在上面把这些分子的形式改写了,大家可以看到,这是一个氢与氢之间的单键,含一个氮与氮之间的三键。

    麻省理工公开课 - 化学原理课程节选

  • If you looked at heteronuclear molecules and you wanted to compute the bond energy, you might start with the bond energies of the two constituents.

    如果你看那些相同电子的分子,你想计算共享能,你也许会从,两个组成部分的总能量。

    麻省理工公开课 - 固态化学导论课程节选

  • Then minus 1/2 of 2, because we only have one bond or 2 electrons in a bond.

    然后减去二的二分之一,因为我们只有一个键,一个键就是两个电子。

    麻省理工公开课 - 化学原理课程节选

  • Bond allocations had increased by more than could be explained by the increase in bond prices over the course of the year.

    同时资产配置中的债券投资比重,以高于当年债券价格上涨的速度,有了显著增加

    耶鲁公开课 - 金融市场课程节选

  • We see three bonding pairs so this is a triple bond, indeed a multiple bond.

    我们看到3对成键电子所以这是一个三重键,它确实是多重键。

    麻省理工公开课 - 固态化学导论课程节选

  • The bond, it turns out, 5° is 104 . 5 degrees, that h o h bond.

    这个键即,HOH键角,是104。

    麻省理工公开课 - 化学原理课程节选

  • The price of the two-period bond is 1/2 and the price of the one-period bond is 1/.

    所以两年期债券的价格是1/^2,一年期债券的价格则是1/

    耶鲁公开课 - 金融市场课程节选

  • We see that the radius is shorter, so that means that the nitrogen-nitrogen bond is going to be shorter.

    我们看到这个距离更短,这就意味着,氮与氮之间的键应该更短。

    麻省理工公开课 - 化学原理课程节选

  • So if we look at its length, it's actually shorter than a single bond, but longer than a double bond.

    因此如果我们看它的键长的话,它实际上比单键更短,却比双键更长。

    麻省理工公开课 - 化学原理课程节选

  • And we find the same thing for these two atoms here, it's not actually a double bond, it's somewhere between a single bond and a double bond.

    而且我们发现这两个原子的情况是一样的,它其实不是一个双键,而是介于单键与双键之间的。

    麻省理工公开课 - 化学原理课程节选

  • We can know this information even if we just knew that the bond was stronger, we wouldn't need to look at a graph here, because it turns out that if you have a stronger bond, -- that also means that you have a shorter bond -- those two are correlated.

    我们依然可以得到上面的信息,即使我们所知道仅仅是这个键更强,我们不需要去看这个图,因为事实上如果你有一个更强的键,这也就意味着你有一个更短的键-,这两点是互相关联的。

    麻省理工公开课 - 化学原理课程节选

词组短语

bond market 债券市场

in bond (进口货物)在关栈中;保税

bond strength [化]粘合强度;键强度

james bond 詹姆斯邦德

hydrogen bond [化]氢键

chemical bond [化]化学键

bond yields 公债利息;债券市场利息率

convertible bond 可换公司债;可转换证券

corporate bond 企业债券

bond fund 债券基金

double bond 双键

government bond n. 公债;政府公债

bond graph 键合图

bond investment [经]债券投资

covalent bond n. [化]共价键

bond issue 债券发行

treasury bond (美国财政部发行的5年期以上的)长期国库券

bond length 键长

performance bond [经]履约保证书

vitrified bond 陶瓷粘结剂;玻璃熔结剂

  更多收起词组短语
$firstVoiceSent
- 来自原声例句
小调查
请问您想要如何调整此模块?

感谢您的反馈,我们会尽快进行适当修改!
进来说说原因吧 确定
小调查
请问您想要如何调整此模块?

感谢您的反馈,我们会尽快进行适当修改!
进来说说原因吧 确定