Definition: not necessary Level: C2
这是一项不必要的开支。
It was a ___needless expense.
她不必要的担忧给她带来了压力。
Her ___needless worrying caused her stress.
他们经常买完全不需要的东西，并且忘记存钱。
They often buy totally ___needless things and forget to save money.
