科学家说肠杆菌特别难消灭，因为它的一个外层细胞壁可以阻止很多抗生素的侵入。
Scientists say that Enterobacteriaceae are particularly hard to kill because of an outer cell wall that prevents many antibiotics from penetrating.
而对于“失败者”来说，也许有些T细胞更能控制那些难识别病毒的生长，但它们却仍被消灭了。
Among the losers, however, there may be t cells that better control the other less recognizable, but still deadly, strains.
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