50.patent：['peitənt] 专利;专利权

51.jet：[dʒet]喷气式飞机;

将来进行时The specialists will be assessing the patent of the new jet at this time tomorrow.

52.dot

53.ancestor：['ænsistə] 祖宗,祖先

54.boundary：['baundri] 边界,分界线

现在完成时The canal has been the boundary between the two countries

55.barrier障碍,阻碍 现在完成进行时I have been wrestling with the language barrier

56.socket：['sɔkit] 插座;插口相似rocket ( )

57shaver：['ʃeivə] 电动剃须刀拆解：shave( )+r

She put the electric shaver into the socket.

58.carbon dioxide：['kɑ:bən] ：[dai'ɔksaid] 二氧化碳

59.headline大字标题记忆法

• dead + line deadline 到期限

• head+ line headline 见报段

• out + line outline 画轮廓

• under + line under line 是重点

60.hibernation音：[,haibə'neiʃən] 冬眠拆解：hiber+nation( )

动词;

61.update：[ʌp'deit] 更新 拆解：up date

将来完成时The specialist will have updated the database by the end of next week

62.click：[klik]

63.download：['daunləud] 下载 拆解：

64.gave away赠送;分发泄露

65.present vt.赠送,呈献[(+to/with)] n.礼物,赠品[C] a. 出席的,在场的[F]

She gave away all her presents to the poor

66.invest：[in'vest] 投(资)[(+in)]

67. rescue：['reskju:] 援救;营救;挽救[(+from)]

将来完成时Many wild animals will have been rescued by the end of next year.

68. donate：['dəuneit] 捐献,捐赠[(+to)]

He will donate his organ after his death .

69.split：[split] 劈开;切开

70.fade：[feid] 变微弱;(光等)变暗淡;逐渐消失[(+away)]

The dot in the garments will have faded next week

71.spin：[spin] 旋转;

72. permit They are permitted to tell the sources of the souvenir

73.assist：[ə'sist] 帮助,协助[(+with/in)][O2]

现在完成进行时The programmer as well as the instructor has been assisting the participants