B: We had better pay more attention then. 　　loudspeaker 　　n. 扬声器，喇叭 　　A: Did you see my scarf, Dad? 　　B: Yes, it is the lounge , near the TV. 　　lounge 　　n. 休息厅，休息室 　　vi. 1.(懒洋洋地)倚，(懒散地)躺;2.闲逛，闲荡 　　A: The brakes on my bike are not working. 　　B: Perhaps you need to lubricate them. 　　lubricate 　　vt. 使润滑 　　A: I just landed a new lucrative job. 　　B: Great, would you like to share some of your hard earned cash with me? 　　lucrative 　　a. 赚钱的，可获利的 　　A: I had to close my shop. Business had lulled . 　　B: That is such a shame. 　　lull 　　vt. 1.使安静，使入睡;2.缓和，减轻，哄骗 　　n. 暂时的平息(或平静) 　　A: I will have to lumber a clearing in the forest. 　　B: Oh, are you sure it is necessary to cut down the trees? 　　lumber 　　vi. 笨拙地移动，缓慢吃力地移动 　　vt. 拖累，使陷入困境 　　n. 1.(堆放着的)家用废旧杂物;2.木材，不料，锯制板