531.prevent…from 使…不,防止…做
532.previous to(=prior to)在…之前
533.take pride in(=pride oneself on)以…自豪
534.pride oneself on upon 以…自豪
535.in principle(=only in regard to the main idea)原则上
536.prior to(=before)在…之前
537.in private(=privately)私下,秘密地;in public 公开地
538.proceed from(=arise from,result from)由…发出,由…引起(产生)
539.proceed with(=begin and continue sth.)继续进行
540.in progress(=in the state of be done)进行中
541.prohibit…from(=forbid)禁止,阻止
542.in proportion to 与…成比例
543.protect…from 阻止..不受,保护不受
544.be proud of 为…自豪
545.provide for 为…做准备
546.in public 公开地,当众
547.on purpose(=by intention,deliberately)故意
548.to the purpose(=useful for one’s purpose)得要领的,中肯的
549.be qualified in 在某种科目或学科上合格;be qualified for 在某种职业上合格
550.call…in question 对…表示怀疑551.beyond(all)question(=without question)毫无疑问