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
552. out of the question (=impossible)不可能的
553. in question (=under discussion)所谈及的;
554. without question 毫无疑问
555. be caught in the rain 被雨淋了