不可

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。

Be indispensable for/to sth.

对某人或事而言是比不可少的

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

But no one predicted Didier Drogba's reaction would be to make himself indispensable.

没有人能预料到德罗巴的表现令他成为之后不可替代的角色。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。