521. in the position of 处在…位置上

522. in practice 实际上(状语);业务熟练(表语)

523. be(get) out of practice 荒疏,不熟练

524. bring(put)…into practice使…成为现实

525. prefer…to… (choose rather, like better) 宁要, 更喜欢

526. prepare for breakfast 准备吃早饭

prepare breakfast 作早饭

527. in the presence of 在…在场的情况下

528. for the present(=for the time being, for now)暂且,就现在来说; at present现在,此刻

529. preside over / at 主持(会议,业务等)

530. prevail over 占优势, 压倒, 战胜

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