对...必不可少

For earth rock-fill dams, problems about seepage are very serious, so it is necessary to analyze seepage in earth rock-fill dams feasibly and correctly.

在土石坝中，因渗流引起的滑坡、渗透破坏尤为严重，所以合理、正确地对土石坝进行渗流分析是必不可少的。

For earth rock-fill dams, problems about seepage are very serious, it is necessary to analyze seepage in earth rock-fill dams feasibly and correctly.

在土石坝中，因渗流引起的滑坡、渗透破坏尤为严重，合理、正确地对土石坝进行渗流分析是必不可少的。

I believe that the research of the piano accompaniments of Wang Zhixin is essential for the correct and complete interpretation of the compositions, no doubt about its significance.

笔者认为对王志信作品钢琴伴奏的研究对于正确完整的诠释作品是必不可少的，其意义毋庸置疑。

Putnam (1993) showed that social capital is indispensableto the responsiveness and smooth functioningof civic institutions.

普特南（1993）表明，社会资本是必不可少的对反应能力和顺利运作的民间机构。

These principles cannot be afterthoughts - democracy and human rights are essential to achieving each of the goals that I have discussed today.

这些原则并非可有可无-民主和人权对於实现我今天谈到的各项目标必不可少，因为民有和民治的政府更有可能根据本国人民更广泛的利益采取行动，而非当权者狭隘的利益。

Wight also provides an invaluable 'Notable Quotes' section where he extracts and categorises some of the most famous and pertinent sections of Smith's work. This classic work is as essential today as it was when it first written.

怀特介绍，怀特还提供了一个宝贵的'重要的名言摘录'一节，他对史密斯的工作和论著进行了有效地提炼并将它们归纳到非常显著的章节之中，为了这本书能够成功的出版和面世，这项典型的工作是必不可少的。

Wight, University of Richmond, which aims to place the work in a business context.Wight also provides an invaluable 'Notable Quotes' section where he extracts and categorises some of the most famous and pertinent sections of Smith's work. This classic work is as essential today as it was when it first written.

怀特介绍，怀特还提供了一个宝贵的'重要的名言摘录'一节，他对史密斯的工作和论著进行了有效地提炼并将它们归纳到非常显著的章节之中，为了这本书能够成功的出版和面世，这项典型的工作是必不可少的。

Collocations are considered an important part of second language lexical development and are indispensable for language learners.

他们认为搭配是二语词汇发展的重要组成部分，而且对外语学习者来说，搭配学习必不可少。

This precautionary system for management originates from the understanding of human nature, so it is a necessary link in the management mech...

这种保障性管理制度的产生，源于对人性本质的认识。它是管理制度中必不可少的一个层次。

Besides, the set of chemistry courses among the students major in literae humaniores and social science bears practical meanings to cultivate their scientific quality, and master useful chemistry knowledge both in daily life and social decision-makings.

而在人文社科专业的学生中开设化学类的素质教育课程对培养其科学素养，掌握日常生活及参与社会决策中必不可少的有用化学知识具有实际意义。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。