这是一种比快速轮询原更有效率的无限推送方式，而快速轮询正是其它多数推送技术所采用的。
That is a significantly more efficient way of doing wireless push technology than fast polls, which is what most other technologies use.
有可能还有其它很多种，因为许多过敏原似乎分享着相似的氨基酸序列，可能会使免疫系统产生混乱。
There are likely to be many others, since many allergens seem to share similarities in their amino acid sequences that might confuse the immune system.
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。
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.
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