求翻译：4、信息检索就是在浩瀚的知识海洋中，有的放矢，查找所需要的有价值或能够帮助解决问题的知识，即是从众多信息中查询并获取所需要资料信息的过程和方法。是什么意思？

正在翻译，请等待...

4, information retrieval is in the vast ocean of knowledge, targeted, and find out the need to be able to help solve the value or the knowledge, that is, from the numerous information enquiries and to obtain information about the required information the process and methodology.

4th, the information retrieval is in the vast knowledge sea, with a clear goal, searches has the value which needs or can help to solve the question knowledge, is inquires from the multitudinous informations and gains needs the material information the process and the method.

4, in information retrieval is in the vast ocean of knowledge, targeted, required to find valuable or knowledge that can help solve the problem, that is, from one query and get the information needed to process and method of information.