a needle in a haystack
释义
落进草垛里的一根针（比喻很难找的东西）；
双语例句
It's like trying to find a needle in a haystack.
这简直就像大海捞针一样难。
权威例句
Finding a needle in a haystack-or identifying anonymous census recordFinding a needle in a haystack: pinpointing significant BGP routing changes in an IP network
Finding a needle in a haystack of reviews:cold start context-based hotel recommender system
Searching for a Needle in a Haystack: Predicting Security Vulnerabilities for Windows Vista.
A needle in a haystack: local one-class optimization
Searching for a Needle in a Haystack: Evaluating Survey Methods for Non-indigenous Plant Species
Magnesium and the control of cell proliferation: looking for a needle in a haystack
Finding a Needle in a Haystack: Direct Determination of Vibrational Signatures in Complex Systems
Looking for a needle in a haystack: inference about individual fitness components in a heterogeneous population
Finding a needle in a haystack using hints and evolutionary computation: the case of evolutionary MasterMind.
1. Searching for one man in this city is like looking for a needle in a haystack.
在这个城市里找一个人无异于大海捞针。
《牛津词典》
2. Once an article appears on the show, hunting it down in stores is harder than finding a needle in a haystack.
一旦一件商品成为焦点，想在商店里找到它简直比大海捞针还难。
youdao
3. That's like looking for a needle in a haystack.
这就像大海捞针。
youdao
4. I think it's lost forever because those mountains are so vast and inaccessible that you're looking for a needle in a haystack.
我认为它永远消失了，因为这些山脉是如此巨大艰险，你无疑是在大海捞针。
youdao
5. It's like finding a needle in a haystack.
这简直是大海捞针。
youdao
6. Looking for them now is like fishing for a needle in a haystack!
这回要在庄稼地里搜捕，那不是海底捞针！
《新英汉大辞典》
7. I can use a rough sketch or import an image to query similar images from a bucket of hundreds of disparate images - almost like finding a needle or two in a haystack of images.
我可以使用一个草图或是导入一个图像来从数百个不相干的图像中查询类似的图像—类似于从图像堆中寻找一两个图像。
youdao
8. If not, and it's still there, I think it's lost forever, because those mountains are so vast and inaccessible that you're looking for a needle in a haystack.
要不然，它就一直在那儿，我想可能再也找不到了，因为这些山脉是如此巨大艰险，你无疑是在大海捞针。
youdao
9. This may sound a bit like a needle-in-a-haystack problem. There are in many cases millions of bytes of data in a single running program.
这听起来有点像大海捞针，在一个单独运行的程序里有成千上万字节的数据，漫无目的的在数据海洋里乱找结果不会很理想。
youdao
10. Sometimes trying to find something on the worldwide web is like trying to find a needle in a haystack.
有时候在互联网上找东西就和大海捞针一样难。
youdao
11. It is a needle in a haystack.
就是大海捞针。
youdao
12. “Most search engines try to help you find a needle in a haystack, ” Mr. Rajaraman said, “but what we’re trying to do is help you explore the haystack.”
“大多数搜索引擎似乎试图协助你从干草堆里寻找一根针，”Rajaraman先生评介到，“但我们正在试图做的是帮助您探索这堆干草。”
youdao
13. This artist's concept of the needle-in-a-haystack object found by Hubble is only 3, 200 feet across and a whopping 4.2 billion miles away.
哈勃望远镜大海捞针地从42亿英里远处发现了这个只有3200英尺(0.97536千米)大的天体，这是艺术概念图。
youdao
14. Here's an example. Oftentimes, find is helpful for locating a needle in a haystack, such as locating all the USES of a particular system call in a large body of application code.
例如，用户经常使用find在大范围内寻找很小的东西，比如在大量应用程序代码中寻找使用某个系统调用的所有地方。
youdao
15. Just one needs to be under the virus writers' control to turn Conficker into a newly configured botnet - making the task of catching the exact site a search for a needle in a computing haystack.
病毒作者只需要控制其中的一个以将Conficker放入这个新配置好的Botnet-找到这个站点就像大海捞针。
youdao
16. This can be like finding a needle in a haystack, especially if the SQL was generated by a third party, such as Hibernate or JPA.
这就像是大海捞针，尤其是在sql由hibernate或JPA等第三方软件生成的情况下。
youdao
17. "It was like looking for a needle in a bad, gooey, sticky, nasty haystack," says Hotamisligil.
“这就像大海捞针一样，”Hotamisligil说。
youdao
18. We often ignore the real problem and instead search for a needle in a haystack. Solving problems of any kind requires one to adopt a direct approach which addresses all relevant issues.
我们经常忽略实际问题，而是大海捞针。解决任何类型的问题都需要一个人采取直接的办法处理所有相关事情。
youdao
19. Even if the Drake Equation is true, and there are millions of civilizations out there, finding them is like looking for a needle in a haystack.
即使德瑞克方程序是真的，确实存在着数百万的文明，但要找到他们就像大海捞针。
youdao
20. Finding a function that has had its code patched is like looking for a needle in a haystack, except that you don't know what the needle looks like.
查找代码被打了补丁的函数，就像大海捞针一般，你不知道这个针是什么样子。
youdao
21. Searching for one man in this big city is like looking for a needle in a haystack.
在这座大城市里寻找一个人犹如大海捞针。
youdao
22. Searching for one in this big city is like looking for a needle in a haystack.
在这座大城市里寻找一个人犹如大海劳针。
youdao
23. The thief ran quickly and disappeared in a sea of faces in the subway, leaving the policeman with a job like finding a needle in a haystack.
小偷跑得很快，消失在地铁的人山人海里。警察要找他好像大海捞针一样。
youdao
24. The movie theater was so crowded that getting a seat was like finding a needle in a haystack.
电影院人满为患，想找到一个座位可谓大海捞针。
youdao
25. Being in an unfamiliar city can be frightening. And finding an address can be like looking for a needle in a haystack.
置身于一个不熟悉的城市里可能是件令人害怕的事，而寻找一个地址也可能像是大海捞针一样。
youdao
26. If it is past pedestrians away, and that is to find a needle in a haystack is difficult.
如果是过往的行人拿走的，那要想找到已是大海捞针一样难了。
youdao
27. There is no use searching for him in this crowd; it is like looking for a needle in a haystack.
要在观看足球赛的人群中找一个小男孩真像是海底捞针，谈何容易。
youdao
28. There is no use searching for him in this crowd; it is like looking for a needle in a haystack.
要在观看足球赛的人群中找一个小男孩真像是海底捞针，谈何容易。
youdao
a needle in a haystack
