不可缺少

The Map Symbol Base System is not only one of the basic functions of Geographic Information System, but also an important research issue in GIS.

地图符号库系统不仅是地理信息系统中不可缺少的基础功能模块之一，也是GIS的一个重要研究课题。

I've used both an find them to be indispensable tools for getting things done efficiently.

我自己是两个都用，并且发现它们是使事情有效完成的不可缺少的工具。

Along with the continuous development and progress of society, the modern food packaging containers will be everywhere in life and indispensable for daily use.

随着社会的不断发展与进步，现代食品包装容器将成为生活中随处可见且不可缺少的生活用品。

Conduct and actions is a rational investor, should be an indispensable required course for the confidence of the risk and the income.

作为一个理智的投资者，对于风险和收益的把握应该是不可缺少的必修课。

Just as your clothing is a necessity as you go out into the world, let it be equally indispensable for you to put on Jesus Christ, to abide in Him and walk with Him all the day.

当你要去与世人接触的时候，衣服怎样是你所必需的；但愿披戴基督，住在他里面，整天与他同行，对你也同样是不可缺少的。

We always get to know some strangers in this occasion.Asians often deliver their business cards with both hands respectfully,it seems to be an indispensable etiquette for them.

在这种场合陌生人相识，如果是亚洲人，他们往往开口之前先毕恭毕敬地用双手把自己的名片呈递给对方，这好像是不可缺少的礼节。

Controlled synthesis of carbon nanotubes and assembling them into macroscopic structures are of great importance to the applications of carbon nanotubes, and a deep understanding of the growth mechanism of carbon nanotubes would be an indispensable prerequisite for well-defined synthesis in a controllable way.

碳纳米管的可控制生长，及其宏观尺度结构的制备，对于碳纳米管的应用具有重要的意义，为了实现准确的生长控制，对碳纳米管生长机理的深入了解是不可缺少的前提条件。

I think it will be an indispensable parallel to economic cooperation and political cooperation," he says."

我认为，教育合作是一条与经济合作和政治合作不可缺少的平行线，这是一个让双方可以更严肃地审视对方的好时机。

It appears to be indispensable elements in social integration.

它可以缓解信息、知识分化的负面影响，是消除知识贫困的有效手段、途径，是社会整合不可缺少的重要社会基础。

Be indispensable to; be a must to

必要的；不可缺少的

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。