| 释义 |
- abbr.英国旅游管理局（British Tourist Authority）
- 1
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)。 - 2
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。 - 3
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。
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