54. be in prison 入狱　　 be out of prison 出狱

53. principle　 原理　 It is a matter of principle.　 这是一个原则问题

　 stick to the principle = live up to the principle遵守原则 on principle　 按照原则

52. principal 最重要的　　 The yellow river is one of the principal river of China.

51. primary　 最初的 the primary school 小学　 the primary forest 原始森林

the primary meaning of this word 这个单词原义 a matter of primary importance 头等重要大事

50. take pride in = be proud of 为…感到自豪

49. previous　 先前的　 a previous engagement 预约　 I have no previous experience of this job.

48. press the bell 敲铃　　 press the button 按铃　　　 press conference 记者招待会

press sb for sth 催促 The bank is pressing us for repayment of the loan.　 催我们还贷款

pressure　 .压(力)　　 under the pressure of　　　 take one’s blood pressure 量血压

47. preserve　 保护　 preserve the forest　　 preserve public order 维护公共秩序　

46. presence　 在场；出席　　 May I require your presence ?　　 in the presence　 of 在…面前

　present　 现在的，出席的　　 be present at = attend　　 the students present　 出席的学生

　　 礼物，现在　　 at present　 现在　　　 for the present　 暂时

　 赠送　 present sb sth　 present him a book = present a book to him

　　　　 Sample are presented free.　 免费赠送

presently　 不久 (soon, before long)　　

45.prepare 准备　 prepare sth　　 prepare for sth 为…而做准备　 be prepared for 为…做准备

　　　　　　　　　 make preparations for做准备