sigma2sp It's going to be a sigma bond. So, we have sigma 2 s p, carbon 2 s p. So they're two s p bonds combining.

是sigma键，我们有，碳2sp。，所以它们是两个sp键结合。

youdao

Two of the three main credit-rating agencies, Fitch and Standard & Poor’s (S&P), cut their rating on Greek bonds and gave warning that a further downgrade was likely.

三个主要评级机构中的两个--惠誉与标准普尔--降低了其对希国债的评级，并警告可能进一步降低评级。

youdao

Mike Thompson of Thomson Financial says that, since 1991, the correlation between the performance of high-yield bonds and the S&P 500 index has been pretty low—less than 20%.

汤姆逊金融公司的迈克•汤姆逊这样说道，自1991年，高收益债券和标普500指数之间的相关性就非常低，不到20%。

youdao

sigma2sp It's going to be a sigma bond. So, we have sigma 2 s p, carbon 2 s p. So they're two s p bonds combining.

是sigma键，我们有，碳2sp。，所以它们是两个sp键结合。

麻省理工公开课 - 化学原理课程节选

Remember, we didn't hybridize the 2 p y orbital, so that's what we have left over to form these pi bonds.

记住，我们并没有杂化2py轨道，这是我们剩下的那个行成了π键。

麻省理工公开课 - 化学原理课程节选

So, what we end up having is three of these pi -- 2 p y 2 p y bonds, we can have one between these two carbons here.

我们剩下的有三个π键-,2py2py键，在这两个碳原子之间会有一个。

麻省理工公开课 - 化学原理课程节选

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