- 問題詳情:Haveyoueverheardsomeoneusethephrase“onceinabluemoon”?Peopleusethisexpressiontodescribesomethingthattheydonotdoveryoften.Forexample,someonemightsaythathetriestoavoideatingsweetsbecausetheyareunhealthy,butwilleatchocolateonceinabluemoon.Orsom...
- 20145