必不可少

It is indispensable to those whose basic work has implications of near-term practical benefit.

该杂志对于那些具有短期实际效应的工作人员是必不可少的。

They are never really our friends; at best, they are a necessary evil.

他们永远不会是我们真正的朋友，他们至多是一种必不可少的痛苦。

Water is a necessity of life.

水是生命必不可少的。

The remaining 1% is present in body tissues and fluids where it is essential for cell metabolism, muscle contraction and nerve impulse transmission.

剩余的1 ％存在於人体组织和液体的地方是必不可少的细胞代谢，肌肉收缩和神经冲动传递。

Calcium is essential in the body for many functions including bone formation, blood coagulation, muscle contraction, and nerve impulse transmission.

钙是宠物必不可少的，包括骨形成，血液凝固，肌肉收缩的功能很多，和神经冲动的传输。

As Lake Nicaragua was the essential element in the Nicaraguan plan, providing both easy navigation and an abundant source of water for the canal, so his man-made lakes would serve at Panama.

至于尼加拉瓜湖是必不可少的因素，在尼加拉瓜计划，同时提供简单易用的导航功能和丰富的水源供运河，所以他的人造湖泊将在巴拿马。

Along with the capability of computers continuously enhanse,and the price continuously fall,computer has more and more widely apply in many ways such as hospital medical treatment,teaching,scientific reseach,manage and so on Computerize hospital information system has became the necessary foundation establishment and technic support environment to the modernize hospital operation Just like a modernize hospital's successful operation can't leave the building of full function 、nice look and comfort;medical persons of skilled technic and complete capability、advantaged medical equipments,it also can't leave computerize hospital information system Under the impact of the information-based tide, and so the introduction of the informationization of the hospital emerges, as the times require The management information system of the hospital is the important assistant means of medical treatment service and management The application of the HMIS can alter the traditional work mode, Improve working efficiency, economic benefits, management level and quality benefit of improving the hospital

随着计算机性能不断提高，价格不断下降，计算机已在医院医疗、教学、科研、管理的各个方面得到越来越广泛的应用。计算机化的医院信息系统已成为现代化医院运营必不可少的基础设施与技术支撑环境。就好象一个现代化医院的成功运行离不开功能完整、美观舒适的建筑物，技术娴熟的医护人员，性能齐全、高精尖的医疗设备一样，它也离不开计算机化的医院信息系统。在信息化浪潮的冲击下，医院信息化的引入势在必行。医院管理信息系统是医疗服务和管理的重要辅助手段。医院管理信息系统的应用可以改变传统的工作方式，提高工作效率和经济效益、提高医院的管理水平和质量效益。

And niobium microalloying or micro-niobium treatment is absolutely necessary for successful development and application of this technology.

铌微合金化和微铌处理则是实现这项技术必不可少的条件，CSP流程开发含铌微合金化钢前景广阔。

One nitpick of mine is that the sidebar isn't as accessible as the ones in Internet Explorer and Opera, which offer button access.

你可以说我故意找茬，但这个工具条的确不如IE浏览器或者Opera工具条上的按键来得必不可少。

Also,no celebration is complete without eggedosis,the brandy-spiked Norwegian nog whose beaten egg whites make it so thick that it must be eaten with a spoon.

但是有一样东西是必不可少的，那就是eggedosis，那是一种搀了白兰地的挪威蛋奶酒，里面放了打过的蛋白使酒变得很稠，稠得只能用勺吃才行。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。