adv.徒劳地，不成功地，白费力地...

plainly的音标：plainly的英式发音音标为：['pleɪnli]plainly的美式发音音标为：['pleɪnli]...

certainly的近义词有：certainly, naturally, of course, surely。下面这些副词或词组均有"肯定地，当然"的含义：certainly：强调有把握，深信不疑。naturally：指自然而然，毫无造作或天生如此。of course：指毫无疑问，自然如此。可与certainly和naturally换用。surely：表一种必然的可能性，也可表示信心或不轻信。强调主观判断。...

adj.姿态优美的...

He hunted vainly through his pockets for a piece of paper.他翻遍口袋想找一张纸，结果没找到。The criminals vainly sought concealment from the searchlight.罪犯们徒劳地躲闪着探照灯光。He shouted after them, vainly trying to attract their attention.他在他们的后...