Activity class is a indispensably in college live .

课外活动是学校生活不可缺少的一环。

High-resolution seismic method is an indispensably method of detecting active fault in city .

高分辨率地震方法在城市活断层探测中,已成为一种不可缺少的方法技术。

As an important scientific measurement method , citation analysis is an indispensably effective way to study the scientific structure and the research subject of disciplinary .

引文分析作为一种重要的科学计量方法,对研究科学结构和学科研究主题是不可缺少的有效手段。

The construction of police campus culture is a unique cultural way in the great social cultural system , an indispensably important part in the system of " developing chinese advanced culture " .

公安校国大化建设是杜会文化大系统中一支独特的文化形式，是“发展中国先进文化”体系中不可缺少的重要组成部分之一。

With the development of oil-field exploration and exploitation research work in our country , high-tech computer equipments and advanced application software have become indispensably important tools for finding and developing reservoir .

随着我国油田勘探开发研究工作的不断深入，高尖端的计算机设备和先进的应用软件已成为科研人员寻找和开发新的油气藏不可缺少的工具。