population [,pɔpju'leiʃən] n. 人口(citizens, community, inhabitants, natives, residents)
population boom 人口爆炸
population census 人口普查
e.g. what is the population of this country?
pose [pəuz] v. 提出(ask, present, put forward, suggest)，造成（cause），使摆好姿势n. 姿势(position)
pose an argument 提出观点
e.g. let's pose for a group photo.合影
position [pə'ziʃən]n. 位置(location,place, point, site, spot)，职位(employment, job, occupation)，立场(attitude, opinion, perspective, standpoint, view, viewpoint)，形势(situation, state, circumstances, condition)
in a difficult position 处于困难境况
be in a position to do sth. 能够...，有...的机会
put oneself in sb.’s position 设身处地
e.g. before the debate辩论， both sides made their positions clear.
post[pəʊst] n. 柱(column , pillar, pole), 岗位(location, place, point, position),职位(employment, job, position), 邮政(mail)vt. 张贴(put up, stick up),邮递(mail, send, transmit)
post card 明信片
post office 邮电局
post letters 邮寄信件
post-free 免邮资的, 邮资已付的
e.g. tell me where i can post them.
power ['pauə] n. 能力(ability, capability, mighty, skill, talent)，动力(energy, force, strength, vigor)，权力(authority, right) vt.供以动力，激励(inspire, prompt, motivate)
come into power (开始)掌权，上台
fall from power 下野，下台
power politics 强权政治
power station 发电站，发电厂
e.g. sitting out here坐在户外, you really can feel the power of the sun.
practice ['præktis] n.实行，实施，练习(exercise, training)，实习，开业(business)，惯例(custom, habit, tradition)
v.练习(exercise, train, warm up)， 实践(apply, carry out, do, engage in, perform,)，开业
put...into practice 实施...
have a practice of... 有...的习惯
practice medicine 行医
in practice 实际上
practice lesson 实习课
e.g. practice makes perfect. 熟能生巧.
praise [preiz] vt.赞扬(admire, compliment) n.赞扬，赞美(approval, compliment)
in praise of... 为赞美...
speak in praise of... 赞美...
e.g. let us give praise to god.
prefer [pri'fə:] vt. (preferred, preferred, preferring)更喜欢，宁愿(like, pick out, single out, vote for)
prefer ...rather than... 宁愿[愿意]...而不愿...
prefer a to b 喜欢a胜过b
e.g. i much prefer cats to dogs.
prepare [pri'pɛə] v. 准备，预备(arrange, get ready, organize, plan)
be prepared for 准备着...
prepare against... 准备应付(不好的事情)
prepare for... 为...作准备
prepare oneself for(= be prepared for/be ready for ) 为...作准备
e.g. he is preparing his speech for the meeting tomorrow.
present[pri'zent] n. 礼物(gift)，现在(present time)
adj. 现在的(current)，出席的(at hand, here, in attendance)
vt.介绍(introduce)，赠送(award, confer, give, hand over)，提出(put forward)
at present 现在，目前
for the present 眼前，暂时
present oneself 出席，到场
present evidence [律]提供证据
present sb. with sth. 赠送某人某物
e.g. how about your present salary?
preserve [pri'zə:v] vt.保存 (conserve, keep, retain, look after, sustain)， 维持(defend, guard, maintain, protect, secure, sustain)， 防腐
preserve peace 维持和平
preserve nature 保护自然
preserve food 保藏食物
preserve... from... 保护...使其不遭受...(损害)
e.g. i think these interesting old customs should be preserved.
press [pres] v. 压(compress, crush, squeeze)，按(depress, push)，熨平(衣服等)( iron)
n.新闻界(newspaper, magazines)，压，按，压榨机
at (the) press (=in press/come to the press) 在印刷中
press conference 记者招待会
press the button 按按钮
press... on... 把...强加于...
e.g. press this button to start the engine.
pressure ['preʃə] n. 压，压力，压迫(force, load, power, stress, weight)
under pressure 被迫地， 在强制下
release the pressure 释放压力
air pressure 气压
e.g. we must bring pressure in him.
prevent [pri'vent]
v. 防止，预防(avoid, take precautions against)，阻止(check, hamper, hinder, stop)
prevent diseases 预防疾病
prevent...(from)... 阻止...做(某事)， 预防...遭受到...
e.g. what can we do to prevent the disease spreading?