pick over . select the best of选出最好的
She picked the apples over and threw out the bad ones．她把好苹果挑出来，把坏的扔掉。
We picked over the cotton seeds before sowing．我们将那些棉籽经过挑选之后才播种。
pick somebody 's pocket . steal扒窃（某人的东西）
Thieves pick the pockets of unwary people．小偷扒窃粗心大意的人口袋里的东西。
The guy was given a good talking to when he was found picking a customer's pocket in the shop．那家伙在商店里行窃时被当场发现，挨了一顿训斥。
pick up . lift；take up；raise after a fall 拾起；拿起；跌倒后爬起
The children picked up many sea shells at the seashore．孩子们在海边拾到很多贝壳。
During the morning Mrs．Carter picked up sticks in the yard．早上卡特太太在院子里拾柴。
He fell but at once picked himself up．他跌了一跤，但马上又爬了起来。
pick up . pay支付
After lunch in the restaurant，Uncle Bob picked up the check．在餐馆吃完饭后，鲍勃叔叔付了饭钱。
They offered to pick up the bill for all the expenses of the trip．他们表示愿意把全部旅行费用的帐单接受下来。
pick up . take on（开车）带人
The train stopped to pick up passenger．火车停下来让乘客上车。
I'll pick you up at your office．我到办公室来接你。
at the corner the bus stopped and picked up three people．在街拐角处汽车停下来让三个人上车。
pick up . collect收集
They picked up some rumors that the firm was going to close down．他们听到一些关于公司要倒闭的谣传。
They are trying to pick up information．他们在设法收集情报。
He picked up rare coins in seaports all over the world．他在世界各港口收集稀有硬币。
pick up . gather together收拾；整理
It is almost dinner time， children．Time to pick up and get ready．快到吃饭时间了，孩子们。收拾收拾，准备开饭。
Let's pick up the room before everyone arrives．我们在大家来之前把房间整理好吧。
It is time to pick up tools and go home．现在是收拾工具回家的时候了。
pick up . get，learn accidentally 偶然得到（或学到、找到）
He never studied Japanese；what he knows is what he picked up while living in Japan．他从未正式学过日文，他所懂的一些日文是他居住在日本时随便学来的。
He picked up a beautiful statue when he was in Rome．他在罗马时买到了一尊美丽的塑像。
I picked up that volume in a secondhand book shop．那本书是我偶然在一家旧书店里找到的。
He has picked up some bad habits at that club．他在那个俱乐部沾染上了一些坏习气。
pick up . make friends with与…交朋友
Mother told Mary not to walk home by herself from the party be cause some strangers might try to pick her up．妈妈告诉玛丽舞会后不要独自步行回家，因为会有陌生人与她搭讪。
I think she picked him up at a dance．我想她是在舞会上与他认识的。
pick up . arrest逮捕
The main suspect in the murder case was finally picked up by police in London yesterday．谋杀案中的主要嫌疑犯昨天在伦敦被警察抓住了。
police picked the man up for burglary．警察因这男子盗窃而逮捕了他。
pick up . receive radio signals收到信号
With my new radio I can pick up stations all over Europe．我的新收音机可接收到欧洲所有的电台。
The enemy planes are picked up by our radar installations．敌机被我们的雷达发现了。
pick up . rescue somebody from the water从水上救起
Air Sea Rescue picked up the downed airman after receiving an SOS message．空海营救队接到呼救信号后，在海上救起了被击落的飞行员。
They picked up the survivors in the lifeboat．他们救起了救生艇里的幸存者。
pick up . find and travel along（a route，a trail，）发现（道路、踪迹等）并沿着走
State police picked up the bandits' trail．州警察发现了土匪的踪迹。
We picked up the trail of the fugitives and soon overtook them．我们找到逃亡者的踪迹，不久就追上了他们。
pick up . continue or return to something after a break or interruption重新开始
He picked up the story where he had left it the day before．他接着往下讲前天没讲完的故事。
I found it difficult to pick up the discussion again after lunch．我发现午饭后再继续讨论很困难。
pick up . make somebody feel better使感觉好些
Catherine was feeling very bad yesterday but has picked up a lot today．凯瑟琳昨天身体很不好，但今天觉得好多了。
A bit of exercise will pick you up．你稍微运动运动会恢复健康的。
A little food will pick you up．吃点东西会使你感觉好些。
pick up . become faster加快
About a mile out of the station the train began to pick up speed．出站大约一英里，火车开始加速。
a piece of cake . very easy thing非常容易的事
Don't think this job is a piece of cake．You'll have to rack your brains once you start on it ．别以为这事很容易，你干了就知道它是很伤脑筋的。