in-depth investigation and research meaning in Chinese

深入调查研究

• depth:    n. 1.深；深度。 2.(色泽的)浓度；(声音的)低沉 ...
• investigation:    n. 1.研究，调查；审查。 2.研究论文，调查报告。 ...
• research:    n. 1.仔细搜索 (for, after)。 2.〔常 ...

Examples

1. Proceeding from the significance of portresource allocation , this paper , on the basis of in - depth investigation and research , analyzes the current situation of zhejiang ' s main seaports , and drawing on the experience of main allocation modes of seaports abroad , puts forward suggestions on how to enhance the competence of zhejiang ' s main seaports through resource allocation
   摘要论述港口资源整合的意义，在充分调研的基础上，对浙江沿海港口的现状进行分析，借鉴国外港口整合的几种主流模式，就如何对浙江沿海五大港口进行资源整合、提升其整体竞争力提出自己的观点。