必不可少

Lifejackets are essential for all types of kayaking.

救生衣是必不可少的为所有类型的独木舟。

Finally, according to the rule of investigation of injury and death accident, we bring forward correspond measure by methods of artificial intelligence and Fault Tree Analysis, which make it an important and necessary part of MIS of injury and death accident.

最后，根据伤亡事故调查处理规则，利用人工智能技术的特点、方法，运用事故树的方法对具体的实例进行分析，通过对各个子事件重要度大小的不同，提出相应的预防措施，把它作为伤亡事故管理信息系统的一个重要的子模块和一个必不可少的有机组成部分。

In Lord of the Flies, the small male society on the island and phallocentrism it represents experienced

在《蝇王》中，由于女性的缺场，荒岛上的男性小社会和其代表的菲勒斯中心文化经历了从建立到面临危机直至最后崩溃解体的过程，从反面揭示了女性的在场是必不可少的。

The charateristice of this quipment are:fabrication at scene,maintain the freshness and nutrition maximum.Rich in 17 kinds of amino acids,8 essential amino acids human but can not synthesized by ourselves,and more than 11 kinds of vitamins,especially B vitamins that rare in other foods;Besides,brew yellow beer,black beer,green beer,fruit beer,to meet different taste and level of customer.

该设备的特点是：现酿现饮，最大限度的保持了啤酒的天然新鲜度和营养，富含十七种以上的氨基酸，其中含有八种人体必不可少又不能合成的氨基酸，还有十一种以上的维生素，特别是其它食品中少有的B族维生素，并且，酿酒师可以根据客人的不同口味分别配置黄啤、黑啤、绿啤、果啤，以满足不同层次和口味的消费者的需求。

However, nail care is essential for both men and women and few tips that will help you get that perfect nails sitting at home.

然而，指甲护理是必不可少的男人和女人和几个技巧，将帮助您获得完美钉子坐在家里。

The after bath lotions replace essential oils and maintain the skin moisture essential to give your skin a young and refreshing look.

该浴后乳液取代精油和保持皮肤水分必不可少的，让您的皮肤年轻和清新的外观。

MSHA and the Solicitor agree that transparency is essential to ensure public confidence that the purposes of the Mine Act are fulfilled and that administration of the Mine Act is fair.

MSHA和律师一致认为，透明度是必不可少的，以确保公众信心的目的，矿法的履行，管理排雷法是公平的。

Shear wave velocity is a parameter that geophysicists always want to obtain and is essential in AVO forward modelling. But at present there is no effective method to calculate shear velocity.

横波速度一直是地球物理学家非常希望得到的，也是AVO正演模拟必不可少的参数，而目前缺少具有理论基础的计算横波速度的方法。

These principles cannot be afterthoughts - democracy and human rights are essential to achieving each of the goals that I have discussed today.

这些原则并非可有可无-民主和人权对於实现我今天谈到的各项目标必不可少，因为民有和民治的政府更有可能根据本国人民更广泛的利益采取行动，而非当权者狭隘的利益。

These principles cannot be afterthoughts -- democracy and human rights are essential to achieving each of the goals that I've discussed today, because governments of the people and by the people are more likely to act in the broader interests of their own people, rather than narrow interests of those in power.

这些原则并非可有可无—民主和人权对于实现我今天谈到的各项目标必不可少，因为民有和民治的政府更有可能根据本国人民更广泛的利益采取行动，不必屈从于当权者狭隘的利益。

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。