如果担心儿童出现危险反应，应尽快求助于卫生保健提供者。
If there are concerns about a child's safety from a reaction, consult a health care provider as soon as possible.
了解药物潜在的危险反应这项重任，是药剂师们必须完成五或六年专业培训的原因之一。
The burden of knowing about potentially dangerous drug reactions is one reason pharmacists must complete five or six years of academic training.
原始人们需要能够像这样反应以逃脱危险的动物。
Primitive humans needed to be able to react like this to escape from dangerous animals.
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