英文: I tried again and again, but failed again and again.
中文: 我一次一次的追求,一次一次的又失掉了。英文: Again and again; repeatedly.
中文: 一次又一次地;重复地英文: I will repeat these words again and again and again.
中文: 我一遍又一遍地重复这句话。英文: Difficulties come again and again.
中文: 困难相继出现.英文: saying Welcome aboard!again and again.
中文: 一遍又一遍地说: “欢迎登机!”.