以下为句子列表：
英文: Combinations of allergens can result in additive effects, for instance... a dog which reacts to a food allergy along with a dust mite allergy and maybe a ragweed allergy will show more severe symptoms than a dog allergic to only one.
中文: 变态反应原的组合可能导致叠加性作用,例如...起反应对食物过敏与尘土小蜘蛛过敏和可能猪草过敏一起的狗将显示更加严厉的症状比狗过敏到只一个。
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英文: BRONCHIAL PROVOCATION TEST WITH RAGWEED POLLEN ALLERGEN
中文: 豕草花粉过敏原的支气管激发试验
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英文: In ragweed pollen-sensitive subjects with autumnal asthamtic attacks, intradermal test was positive in 88.%( 9/)of the cases and HRBT(histamine-release- from-basophil test)was positive in 70.% of the cases.
中文: 花粉皮试阳性组豚草茎叶浸出液皮试阳性率为88.%( 9/),HRBT阳性率为70.%( /)。
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英文: In contrast,in 0 ragweed pollen in- sensitive subjects with seasonal asthmatic attacks,percentages of positive cases were .% (/ 0)and .(/ 0)respectively.
中文: 而花粉皮试阴性组豚草茎叶浸出液皮试阳性率为 .%(/ 0),HRBT阳性率为.%(/ 0)。
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英文: The accumulated ragweed controlled area during 988～990 amounted to hm with a control efficiency of 98% or more always.
中文: 989～ 99年三年中累计防除面积达到 余 hm ,防效均在 98%以上。
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