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。

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Separately, S&P yesterday lifted its outlook on the U.S. life insurers to “stable” from “negative, ” saying the industry may sidestep downgrades next year after raising funds in stock and bond sales.

标准普尔昨天把美国保险企业的预期从“负面”上调为“稳定”，表示美国保险企业经过发售股票筹集资金和债券出售后，可能在明年避免评级遭到下调。

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That's because S&P is expected to follow its U.S. downgrade with cuts in ratings of some muni bond issuers, particularly states that get significant amounts of federal funding.

因为继美国国债评级下调之后，预计标普会降低这些市政债券的评级，尤其是那些拥有庞大联邦基金的州。

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

So it's going to be a sigma bond, 1s and we have oxygen 2 s p 3 and hydrogen 1 s.

它是sigma键，我们有氧2sp3和氢。

麻省理工公开课 - 化学原理课程节选

And the last bond that we have here is a carbon-carbon bond, and this is our last p orbitals that are coming together.

最后一个键是碳碳键，这是最后一个组合的p轨道。

麻省理工公开课 - 化学原理课程节选

Michael Shea, managing partner at Direct Access Partners, noted on Friday, when the bond market closed early at 2 p.m.

WSJ: U.S. Stocks Hit 5-Month High