必不可少

Trained teachers are essential and must be paid award salaries which together with "oncosts" is a large part of the school's expenditure.

受过训练的老师是必不可少的。必须付给老师的薪金以及其他&间接成本&占据了大部分学校的开支。

This is due to the decrease in the hormone oestrogen after the menopause, which is essential for healthy bones.

这是由于减少，在荷尔蒙雌激素后，更年期，这是必不可少的健康骨骼。

Basic numeracy skills, such as the ability to tell the time, count money and carry out simple arithmetic , became essential in this new urban lifestyle.

基本算术技能，如能告诉的时间，金钱和伯爵进行简单的算术，成为必不可少的这个新的城市生活方式。

It is essential, therefore, to prevent or treat pain in neonates, the authors write.

它是必不可少的，因此，以防止或治疗疼痛的新生儿，作者写。

By virtue of equality, credibility, cooperation and development business philosophy has always been to use the reputation of Service legislation in order to brand a market, to create the industry's essential quality binding!!!

凭借平等、诚信、合作、发展的经营理念，一直以来用服务立声誉，以品牌创市场，竭力打造业界必不可少的装钉精品！！！

In the wind - solar hybrid power supply System, because of wind and solar intermittent, random, regional differences, as well as the time difference makes energy storage devices has become a complementary scenery in the entire power generation system in one of essential components.

在风光互补发电系统中，由于风能和太阳能的间歇性、随机性、地区差异性以及时间的差异性，使得储能装置成了在整个风光互补发电系统中必不可少的部件之一。

Defense and energy must become our trademark if we have any shot of reaching the post season.

如果我们还想打季后赛，那么记住防守和能量也是必不可少的。

Therefore, in international trade, a well-written business letter is essential.

所以在国际贸易中，一封好的商务函电便变得必不可少。

I think an appreciation of that kind of beauty is essential to our life, for beauty, it seems to me, is what is old and mellow and well-smoked.

我认为在我们的生活中欣赏那种美必不可少。因为对我而言美是久的，醇厚的和熏制得很好的东西。

An accurate and well-adapted simulation method of projection data for cone-beam CT, which can describe the details of each tomography, is proposed in this paper.

在重建算法的研究过程中，模拟投影数据是必不可少的一部分，一方面可以避免实测投影数据的误差，为后继CT重建算法提供理想的投影数据；另一方面也可以根据需要有选择地模拟失真如：探测器偏移、旋转、响应不一致，射线源

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。