必不可少

For any megacity wishing to remain economically competitive, healthy air quality is a must.

对于任何一个像保持经济持续经济竞争力的大城市来说，良好的空气质量是必不可少的。

Excellent product good service: Greenhouse climate controller is essential to manufacturing industry, a lot of work involved in agriculture, spinning mill, chemical engineering, machine, electronics, medical treatment, construction, automobile repair, food industry, foundry, flower, agriculture repair, food industry, foundry, flower, agriculture etc.

专业品质精诚服务：温控设备是制造业过程中必不可少的设备，好多工农业领域都要使用到，纺织、化工、机械、电子、医疗、网吧、汽车修理、食品、铸造、花卉、农木林等部门的应用尤为广泛。

Modularity is essential for the development of large-scale system software.

模块化是构造大型系统软件必不可少的手段之一。

During this full moon holiday, sacrificial offerings and moon-gazing are essential customs.

在这样一个月圆的节日里，祭月、赏月是必不可少的一种中秋习俗。

Purchasing useful gear for mountain biking is essential to making your bicycling more fun and enjoyable.

采购有用齿轮山地自行车是必不可少的，使您的自行车更充满乐趣和享受。

For those mainland comrades who couldn't make it all the way out to Taiwan for Pride, there's the new episode of QAF Beijing, were the hot girls and guys voguing for the crowds are as clear as in real life. But don't just stare listen and learn. This is essential viewing for any open minded citizen of the 21st century.

去不了的，那就别忘收看这一集的同志亦凡人，骄傲行中搔首弄姿的帅哥美女，看得比现场还清楚，但是也别光看不学，做一个思想开放的现代人，骄傲行可是必不可少的一个环节。

The Venoms are essentially the eyes and ears of the force.

毒液是部队必不可少得眼睛和耳朵。

According to our customers, touchscreen is essential for fully utilising high-end multimedia features and the LG-KC910's interface has been developed to meet these requirements.

& &根据我们的顾客，触摸屏是必不可少的，充分利用高品质的多媒体功能和LG - kc910的界面已发展到满足这些要求。

The brothel creepers and the trilbys pushed casually back on the models' heads added the requisite fifties vibe.

超厚底的橡胶底鞋和呢子帽军装对于模特们来说必不可少。

Because of these reasons, the detection of transgenic products has became indispensable and necessary.

由于安全性的问题，转基因生物的检测就变得必不可少，至关重要了。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。