Besides, we should take some Vitamins A and B2 regularly.

此外，我们应该定期服用维生素 A 和维生素 B2。

youdao

A regular amount of vitamins A and B2 should also be taken.

还应定期服用维生素 A 和 B2 。

youdao

Vitamin B2 (Riboflavin)

维生素B2 (核黄素)

youdao

So the events that I don't really know the details of, we can just call B1, B2, B3, up through Bn.

由于我不知道某些具体的生理过程,我们可以叫它B1 B2 B3一直到Bn

耶鲁公开课 - 死亡课程节选

So for b 2, which is a single bond, that's 289 kilojoules per mole to break it, and it takes us more energy to break this double bond for carbon, which is 599 kilojoules per mole.

对于B2，它是单键，需要289千焦每摩尔来打破它，而对于碳双键,打破它要更多的能量，等于599千焦每摩尔。

麻省理工公开课 - 化学原理课程节选

Let's just first fill in this for the b 2 case.

让我们先填完这个B2的情况。

麻省理工公开课 - 化学原理课程节选

It also saw the birth - a few months later - of B2 92.

BBC: B92: Belgrade's impartial voice

It later confirmed that an explosion had taken place "in the B2 building of the administrative centre".

BBC: Mexico City blast at state oil firm Pemex kills 25

The April downgrade by Moody's of Crown debt from B2 to Caa3 was in part because of future asbestos claims.

FORBES: An Affair to Remember