Natural killer cells, which are a class of lymphocyte distinct from t cells and B cells, destroy foreign cells (eg, neoplastic cells) even without prior sensitization.

自然杀伤细胞是一类与T细胞和B细胞不同的淋巴细胞，可在未被致敏的情况下破坏外来细胞(如肿瘤细胞)。

youdao

Without a first line of defense--innate immunity--mammals would succumb to pathogens still unrecognized by B and T cells.

失去一线防御——非特异性免疫——哺乳动物就只好屈服于那些尚未被B细胞和T细胞所识别的病原体了。

youdao

It says, in either case in general, t of b-- and this is where I'm going to abuse notation a little bit but I can basically bound it by t, 12 steps plus t of b over 2.

我可以用一个,比12+t的数代表,这里有点不准确的地方,具体的步数依赖于奇数偶数，但是你们可以看到在两个case中。

youdao

"His name is John Barovetto, B-a-r-o-v-e-t-t-o.

VOA: standard.2010.05.31

Well, that then says after another 12 steps, 12+12+t we're down to a problem with size t of b over 4.

更进一步，也就是。

麻省理工公开课 - 计算机科学及编程导论课程节选

b It's pretty simple zeroth law says that if a and b it doesn't exactly say that but it implies this.

它很简单，第零定律指出如果a和,这不是第零定律的原话,但其意义是这样的。

麻省理工公开课 - 热力学与动力学课程节选

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