英语

51. Expulsion驱逐，开除

an expulsion order驱逐出境的命令

the expulsion of sb. from school开除某人学籍

52. Extinguish熄灭，灭绝，消灭

Distinguish区别

extinguish a fire灭火

extinguish one's faith in future使某人对未来的信念破灭 extinguish a claim使要求无效

She was extinguished by her sister.她的妹妹使她相形见绌。

53. Extract抽取，榨出物，精华

extract a promise.迫使作出许诺

extract several passages from the speech从发言中摘出几段话

extract the square root of 64开64的平方根

54. Extrapolation预测，推测，【数】外推法

【数】外推法：采用后向数值误差估计思想由精确解推出近似解的误差值

55. Facilitate使容易，帮助