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。

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Often, the psychological problem is not isolated, it is likely to be a chain reaction of a certain event.

通常情况下，心理问题不是孤立存在，很可能是某个事件的连锁反应。

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Neither polymethylmethacrylate nor polymethylmethacrylate-grafted copolymer could be isolated by the reaction of polystyrene methylene lithium prepared in ether solution with methyl methacrylate.

在乙醚溶液制得的聚苯乙烯次甲基锂与甲基丙烯酸甲酯反应不能分离出聚甲基丙烯酸甲酯及它的接枝共聚物。

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Television broadcasters had a camera isolated on Mr. Gore for reaction shots.

FORBES: Debate III: Overcompensation?

The television producers had a camera isolated on Mr. Gore for reaction shots, and their directors edited the videotape of his expressions into a rapid-cut sequence.

FORBES: Rick Perry Overcompensates