介绍:
1)Double [ˈdʌbəl] 翻倍 2) Income [ˈɪnˌkʌm] 收入 3)Effort [ˈefərt] 努力 4)If you want to double your income , you must double your effort . 如果你想你的收入翻倍，你必须加倍努力。5) Discussion [dɪˈskʌʃən] 讨论 6) Discussion [dɪˈskʌʃən] 讨论 7) The plans has been under discussion for a month now , but no conclusion has been reached . 这些计划至今已讨论了一个月了，但还没有结果。
