pounce at . seize抓住

She pounced at the first opportunity to ask questions．她一有机会就问问题。

pound away at . work hard continuously at连续努力地干

If you pound away at the job，you'll have finished it before dark．如果你拼命干，不到天黑你就能干完。

He's been pounding away at the job for the last two days．这两天来他一刻不停地在干这件事。

pound away at . persistently attack连续猛击

The two fleets pounded away at each other until night fall．两支舰队互相轰击直到天黑。

In his speech he kept pounding away at his opponent's inefficiency．他在演说中不断攻击他的对手不称职。

pour down . （rain）fall hard and steadily（雨）倾盆而下；往下流

The rain poured down all day．大雨整整下了一天。

Creeks pour down from the uplands．小河从高地流下。

 pour in . cause to flow in； flow in continuously大量涌入；源源而来

Messages of congratulations poured in on her birthday．她生日那天，贺信源源不断。

The commander poured men in to reinforce the slaughtered battalions．指挥官投入大量士兵增援被打败的部队。

pour oil on the flames . make the quarrel severe火上加油

You pretended that you were helping them out of difficulty，but actually you were pouring oil on the flames and making matters worse．你假装帮助他们克服困难，而实际上你是在火上加油。

pour oil on the waters . quiet a quarrel平息风波；调解争端

The groups were nearing a bitter quarrel until the leader poured oil on the waters．要不是领导人出面调解，双方很快就会大吵起来。

pour out . tell everything about；talk all about倾吐

Mary poured out her troubles to her friends．玛丽向朋友们诉说自己的苦恼。

He poured his heart out to us．他向我们推心置腹。

pour out . stream out倾泻；涌出

The people poured out of the building when they heard the fire alarm．听见火警后，人们从大楼里蜂涌而出。

The water poured out．水涌了出来。

 practise on . impose upon欺骗；利用

He found that he had been practised on．他发现自己受骗了。

John practised on her weakness．约翰利用了她的弱点。

 praise up . praise fully盛赞

They have been praising you up to everyone they meet．他们见到谁都赞扬你。

prefer…to . like…better than较喜欢；宁愿

I prefer tea to coffee．我喜欢喝茶，不喜欢喝咖啡。

prepare for . get ready for准备

The family is preparing for Christmas．全家人正在为圣诞节作准备。

I'm going to prepare lessons for tomorrow．我要准备明天的功课。

press for . urge；keep requesting催促（回答）

The newspaper reporters have been pressing the government for details．新闻记者一直在敦促政府提供细节。

press on .  make one's way with violence or effort挤进

They pressed on in spite of the strong wind． 他们不顾风大仍急速向前。

press on .  cause worry 使烦恼

I can see that the new responsibility is pressing on the young father．我看得出这个新的责任让这位年轻的爸爸感到为难。

press on .  force acceptance强迫接受

I do hope she wouldn't press more food on us．我确实希望她不要逼我们再吃了。

pretend to . profess to have自称

Certainly I can pretend to no special knowledge of electronics．我当然不能说已经掌握了电子学的专门知识。

He pretended to abilities which he didn't actually possess．他自称有这样那样的才能，但实际上并不是那么回事。

 prevail upon . persuade说服

After dinner he prevailed upon me to take a walk in the park．晚饭后，他劝我去公园散散步。

We finally prevailed upon her to enter the association．我们终于说服了她加入协会。

He prevailed upon me to believe in his innocence．他劝我相信他是无辜的。

prevent from . stop妨碍

Nothing can prevent us from reaching our aim．什么也挡不住我们实现自己的目标。

previous to . before在…之前

They made full investigations previous to reaching a conclusion．他们在下结论之前做了充分的调查研究。

prey on . hunt and kill（animal）for food 捕食

Cats prey on mice．猫捉老鼠。

What does the owl prey on? 猫头鹰捉什么东西吃?

prey on . rob； take advantage of劫掠

The robbers living in the mountains preyed on any traveller who wandered into their land．住在山里的那帮强盗对进入他们地区的任何游人都要抢劫。

It was hard to believe that these little boats were being preyed on by pirates．很难相信海盗对这些小船都要抢劫。

prey on . trouble or worry somebody 使痛苦；折磨

His fears and worries preyed so much on his mind that eventually he committed suicide．恐惧和焦虑经常折磨着他，最后他自杀了。

Ill health has preyed on him for years．疾病折磨了他许多年。