piece out . put together from many different pieces拼凑；使…连起来
You must piece out the full story from your own imaginations．整个故事情节得通过你的想象才能串连起来。
They pieced out a meal from leftovers．他们把剩余的饭菜拼凑出一餐来。
piece out . make larger or longer by adding one or more pieces加长；加大
The boy grew so fast that his mother had to piece out his coat．孩子长得太快了，他母亲只好把他的衣服接长。
piece together . put together piece by piece 一片片拼合；拼凑
She pieced together a blanket from odds and ends of wool．她用零碎毛料拼凑成一床毛毯。
One cannot write a good narrative simply by piecing together the details．只是把细节拼凑起来并不能写出一篇好的记叙文。
I managed to piece together what had happened from what he told me．我终于按他讲的情况把事情经过贯穿了起来。
piece up . patch up修补；接合
Let's piece up this broken tyre．我们来把这个破轮胎修补一下。
He was trying to piece up those fragments．他在设法把那些碎片拼合起来。
pile into . pile in . push into ， crowd into （a car， room，football ground，）挤进；拥入
All five of us piled into George's car．我们 五个人全都挤进了乔治的汽车。
Reports of bumper harvests came piling in from all parts of the country．丰收的消息从全国各地涌来。
pile into . pile in . eat吃
The meal is ready， pile in．饭好了，吃吧。
pile into . pile in . attack violently猛烈攻击
John piled into his opponent， almost knocking him down at the first assault．约翰猛击对手，第一次攻击就几乎把他打倒在地。
pile it on . exaggerate；stretch the truth夸大
Stop piling it on； it is not half as bad as you make it appear．别夸大其辞了，情况远没有你描述的那么糟。
pile onto . pile on . put on in a heap堆上
Why is it that all the extra work gets piled onto me at Christmas time? 为什么圣诞节期间把所有额外工作都堆在我身上?
pile on more coal；the fire is going out．火快灭了，再加些煤。
pile out . push out（of a car， room，）挤出去；蜂涌而出
We piled out of the back of the car and stretched our cramped limbs．我们争先恐后地从后面下车，活动一下被挤得动弹不得的四肢。
pile up . grow into a big heap积聚
He didn't go into his office for three days and his work kept piling up．他三天没去上班，工作积了一大堆。
Don't let your work pile up； never leave till tomorrow what you can finish today．不要积压工作，今天能处理的决不要拖到明天。
They had piled up a lot of earth in one corner of the garden．他们在花园一角堆积了很多土。
He has piled up a lot of troubles for himself．他给自己找了一身麻烦。
pile up . crash冲撞
Several cars and lorries piled up on the motorway in thick fog this morning．今天早上，高速公路上有好几辆小汽车及卡车在大雾中相撞。
One car made a sudden stop and the two cars behind it piled up．一辆小汽车突然停住，后面的两辆撞了起来。
pin down . fix by means of a pin；fix immovably用针固定住；压住
They seemed to have pinned his legs down under a heavy weight．他们似乎用很重的东西把他的双腿压得不能动弹了。
pin down . bind使受约制；使受限制
They managed to pin him down to a particular time and place．他们设法给他规定一个时间和地点。
He agreed to lecture here next year， but I couldn't pin him down to a firm date．他答应明年来讲学，但我无法叫他定出一个具体的日期。
pin down . get somebody to make a definite statement使表明态度
We did try to pin him down on his plans for the swimming pool，but he remained evasive．我们的确想要他对他所拟订的游泳池计划表明态度，但他总是闪烁其辞。
pin down . accurately define or determine something 确定；证实
It was impossible to pin down exactly what it was that he was trying to say．不可能完全弄明白他想说的是什么。
pin one's faith on trust .pin one's faith upon trust . pin one's faith to trust 信任
Don't pin your faith on his promises；he is known to be a rogue．不要相信他的诺言，大家都知道他是个无赖。
I shouldn't pin my faith to trust what he says．我不该盲目相信他的话。
pin one's hopes on . pin one's hope on . expect寄希望于
The shopkeeper pinned his hopes on a revival of trade．店主希望生意再度兴隆起来。
Some of the old people pinned their hope on government relief．有些老年人把整个希望寄托在政府的救济上。
pine away . waste away with grief 憔悴
After her son went into the army，she pined away for him to such an extent that her health began to suffer．她的儿子参军以后，她很为他忧伤，身体日渐虚弱。
pipe down . call（sailors） away from work with a whistle吹哨唤（水手们）下班
He piped the men down after boat drill．航行实习后他吹口哨解散队员。
pipe down . stop talking；be quiet停止讲话；安静
Do pipe down！I'm trying to work．务请安静下来！我要干活。
The boy kept interrupting the speaker with questions，and every one of us had to pipe him down．那男孩老是发问，打断发言人的话，我们大家只得叫他住口。
pipe up . speak up .大胆地说
Everyone was afraid to talk to the police，but a small child piped up ．大家都怕同警察说话，可是一位小男孩大胆地站出来开了腔。
He piped up near the end of the meeting．会议临近结束时，他起来发了言。