B You can say a minus B is a plus minus B and we know how to add vectors and we know what minus B is.

可以把A减b看作a加负，我们既知道怎么做加法，也知道负b是什么。

youdao

So basically if we think of buckets and pipes, that's a very thin pipe connecting the bucket for A and B, B so we drip from A to B, C then we have this very fat pipe connecting B and C.

大体上如果我们想象桶和管子，连接A桶和B桶的管子很细，所以液体从A滴入，然后我们有很粗的管子连接B和。

youdao

This irreflexivity can be used to set up an equivalence relation—that is, for Key s a and b , if comp(a, b) is false and comp(b, a) is false , then a and b must be equivalent.

这个反自反性质可以用来建立一个等价关系(equivalence relation)—也就是，对于Keys a和b来说，如果comp(a,b)为false并且comp(b,a)也为false，那么我们就说a和b是等价的。

youdao

Getting a grade like a B-plus or a C-minus adds or subtracts a few tenths of a point.

VOA: special.2009.03.05

a You know that what will happen is that heat will flow from a to b from b to c and from a to c. That's common-sense.

你知道会发生的是热量从流向,从流向,以及从流向。

麻省理工公开课 - 热力学与动力学课程节选

The Hepatitis B subunit vaccine was produced at the same time that HIV-AIDS was being recognized as a problem in this country.

在乙肝亚基疫苗研制出来的同时,在该国家艾滋病开始被视为问题

耶鲁公开课 - 生物医学工程探索课程节选

The third button says Barb, B-A-R-B, delegate for Muskie.

NPR: With White House Bogged Down By Scandal, GOP Looks For Boost

The state-of-the-art building will sit between two Victorian buildings, the B-listed Dunfermline Carnegie Library and a B-listed former bank.

BBC: Funding boost for new museum in Dunfermline

For example, when the B-1A program was restarted to produce the B-1B, the per unit cost of the B-1B was three-times higher than the B-1A. Importantly, the B-1B was a modification (albeit a significant one) of the A-model and a gap of just 18 months occurred in the production line.

CENTERFORSECURITYPOLICY: Center For Security Policy