1.A third of American corporate debt is rated BBB, the lowest investment-grade rating.

三分之一美国公司债务评为 BBB，这是最投资评。机翻

2.And the ratings that were awarded to the bank—of a3 and bbb respectively—were far from the highest notches available.

该银行获得评（分别为 a3 和 bbb）远于现​​有最高评。机翻

3.That has been good news for the high-yield, or junk, bond market, where companies with poor credit ratings (below the investment-grade threshold of BBB) turn for finance.

这对于高收益债券市场或者垃圾债券市场来说，是好消息.在，信评业，也就是于投资评BBB门槛业，可以寻求融资机遇.

4.I know Patrick Starr, BBB cream, no foundation, but I think for a look like this, this just keeps the focus on the eyes.

我知道Patrick Starr推崇BBB霜， 不使粉底，但我认为对于这种妆容来说， BBB霜恰好能将焦点保持在眼部， 同时让肌肤看起来清新自然。机翻

5.I've been really taking care of my skin, so I feel like a BBB cream is just going to take it just really, really pretty, and nice and fresh and clean.

我一直都很注重护肤，所以我觉得BBB霜会让我皮肤看起来非常漂亮，而且清爽干净。机翻

6.CSF analysis can also show an elevated protein concentration because the inflammation leads to a more permeable blood brain barrier, or BBB, which is a selective semipermeable barrier between the circulating blood and the central nervous system.

脑脊液检查也可有蛋白含量升高，由于炎症导致介于循环血流和中枢神经系统之间半透膜屏障，即血脑屏障，通透性升高。

7.At the same time, debt issuance has slowed and yields on American corporate bonds rated bbb, the lowest and most common investment-grade rating, have risen to 5.1%, up from an average of 2.4% in 2021.

与此同时，债务发行放缓，评为 bbb 美国公司债券收益率已从 2021 年平均 2. 4% 上升至 5. 1%。机翻