Those involved had performed acts that are unbecoming of university students.那些参与者的所作所为有失大学生的体面。

His conduct was totally unbecoming to an officer in the armed services.作为一名军官, 他的举止极不得体。

She wore an unbecoming dress hurriedly stitched from cheap cloth.她穿着一件用廉价布料匆匆缝制的难看的连衣裙。