Definition: an unpleasant effect resulting from eating particular things or taking particular drugs Level: B2
我对青霉素有严重不良反应。
I had a severe ___reaction to penicillin.
我哥哥对贝类有过敏反应。
My brother has an allergic ___reaction to shellfish.
小心花生——她对花生有不良反应。
Be careful with peanuts - she has a bad ___reaction to them.
