A minor or isolated reaction can become chronic with repeated exposure to an allergen, or when other cells involved in the immune system, the t cells, come into play.
一开始轻微并单一的反应也可能因为反复接触同一过敏原，或者其它的细胞比如T细胞的参与反应而变成慢性症状。
The exposure of isolated pulmonary artery segment to ONOO - resulted in abnormal reactivities similar to those induced by LPS.
可引起离体肺动脉反应性异常改变，LPS也可产生类似变化；
The exposure of isolated pulmonary artery segment to ONOO - resulted in abnormal reactivities similar to those induced by LPS.
可引起离体肺动脉反应性异常改变，LPS也可产生类似变化；
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