名詞 side effect:

1. a secondary and usually adverse effect of a drug or therapy
2. any adverse and unwanted secondary effect
   同義詞：fallout

1. Medicines sometimes have unpleasant side effects.
   藥物有時具有令人不快的副作用。
2. Physical and chemical tests verify that this Recovery Device has neither radioactive pollution nor toxic side effects.
   經(jīng)理化檢驗證實：使用該器無放射性污染，對人體絕對無毒無副作用。