A complication is a problem or difficulty that makes a situation harder to deal with.
例句
The age difference was a complication to the relationship...年齡差異使得雙方交往更加困難。An added complication is the growing concern for the environment.還有個問題就是對環境的日益關注。
N-COUNT
并發癥
A complication is a medical problem that occurs as a result of another illness or disease.
例句
Blindness is a common complication of diabetes...失明是糖尿病常見的并發癥。He died of complications from a heart attack.他死于心臟病發作引起的并發癥。