This month Moody’s cut its rating from B1 to B3 with a negative outlook, the second cut in five months, and this week Standard &Poor’s reduced it from BB- to B+.

本月，穆迪将其评级从B3下调到B1，前景黯淡，而这也是5个月内第二次的下调。 在本周，标普也将其评级从BB-降低到了B+。

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If scientists are working with a mixture of two cell types, for example a and B, they end up with many AA and BB pairings, as well as the desired AB match.

如果科学家处理的是两种类型的细胞的混合物，例如A和B，他们最终会以AA和BB配对，以及所需的AB配对。

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There are 4 alleles and 8 genotypes in the locus of BM6438, and B is superior gene and BB is superior genotype .

位点BM6438等位基因数为4，形成8种基因型，其中以B为优势基因，BB为优势基因型；

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In the event the ratings agency cut Greek long-term bond ratings by two notches to B from BB- and said that the outlook may bring a further weakening.

FORBES: Government Bonds Ignore Supply, Yields Fall

With loans trading higher in April, single-B loans again outperformed BB paper.

FORBES: Connect

Valuations here remain attractive relative to other quality buckets: spreads for BB and B bonds are still above their long-term historical levels (according to JP Morgan data) and issuers have plenty of cash and little debt maturing in the short term.

FORBES: Should Investors Still Go For High Yield?