unsuccessful的解释a.不成功的,失败的unsuccessful的例句Hewasdiscouragedbytheunsuccessfulattempt.这次不成功的尝试使他气馁。Landonhadmadeanunsuccessfulattemptattherecitation,andthedoctor,somewhatnettled,said:"Landon,youdon'tseemtobegettingonveryfastinthissubject."兰登作了一次不成功的朗诵。老师有点不悦，对他说道：“兰登，你在这门课上好像进步不大，你好像缺乏志向。”
