选举制度是维持议会民主所必不可少的。
Elections are essential for the sustenance of parliamentary democracy.
汽车已成了我们生活中必不可少的一部分。
要把社区工作做好，协作活动是必不可少的。
Cooperative activity is essential to effective community work.
即使在小公司里，计算机也是必不可少的工具。
智能计算机很快将会成为每位医生必不可少的诊断工具。
Intelligent computers will soon be an indispensable diagnostic tool for every doctor.
丰富多彩的、多样化的文化生活对于这对夫妇而言是必不可少的。
A rich and varied cultural life is essential for this couple.
在工作场所，信任也是必不可少的。
帮助工人去适应的政策将是必不可少的。
但帮助工人去适应的政策将是必不可少的。
直到最近，科学家们还认为光是必不可少的。
Until recently, scientists thought that light was essential.
我同意提供更多的公园和体育设施是设计新城镇时必不可少的元素。
I agree that providing more access to public parks and sports facilities is an essential element when designing a new town.
为了获得成功的结果或回报，一定程度的风险几乎总是必不可少的。
In order to achieve a successful outcome or reward, some level of risk is almost always essential.
诸如最低操作年龄、限制操作区域和水上安全必修课等规定是必不可少的。
Regulations such as minimum operating age, restricted operating areas and compulsory classes in water safety are essential.
塞内加尔首都主要医院的精神科医生将其视为治疗过程中必不可少的一部分。
Psychiatrists in the Senegalese capital's main hospital see it as an essential part of the healing process.
氧气在细胞呼吸的新陈代谢过程中是必不可少的，它能使细胞有效地从有机食物中获取能量。
Oxygen is essential for the metabolic process known as cell respiration that allows cells to efficiently harvest energy from organic food.
所以我们一直在讨论营养，环境中的元素对于生物体的发展，健康的生活和繁殖是必不可少的。
So we've been talking about nutrients, the elements in the environment that are essential for living organisms to develop, live a healthy life, and reproduce.
两者都是必不可少的，没有一个是优于另一个的；它们互不冲突反而相辅相成，各有其本身的职权范围。
Both were essential and neither was superior to the other; they were not in conflict but complementary, each with its own sphere of competence.
人们常说，陈词滥调是作家可能犯下的最严重的错误，但对于一个口头吟游诗人来说，它们是必不可少的。
It's said that clichés are the worst sin a writer can commit, but to an oral bard, they were essential.
在整个食品生产周期中，能量是一种必不可少的资源，据估计，生产一卡路里的食品平均需要7-10卡路里的投入。
Energy is an essential resource across the entire food production cycle, with estimates showing an average of 7-10 calories of input being required in the production of one calorie of food.
我们似乎都同意大学教育是极好的，但奇怪的是，当我们看到家庭在这个本应是必不可少的好东西上投入如此之多时，我们却感到担忧。
We all seem to agree that a college education is wonderful, and yet strangely we worry when we see families investing so much in this supposedly essential good.
在每个人的衣橱里，牛仔裤是必不可少的。
旅游保险费用看起来似乎是没必要的，但却是必不可少的开支。
Taking out travel insurance may seem an unnecessary expense, but it is a must.
灯笼是中国新年等重要节日中必不可少的装饰。
Lanterns are necessary decorations during important festivals such as the Chinese New Year.
当然，在节日期间，这种植物是必不可少的。
他们是候鸟必不可少的觅食和繁殖地，十分重要。
They are important and necessary feeding and breeding grounds for migratory birds.
首先，诗歌是学习中国传统文化必不可少的一部分。
First of all, poetry is a necessary part of learning traditional Chinese culture.
智能手机已经成为我们日常生活中必不可少的一部分。
Smart phones have become an essential part of our daily lives.
是的，饺子是必不可少的。
化学物质的蒸发对它们的生存是必不可少的。
The evaporation of chemicals is necessary for their survival.
给人留下良好的印象是日常生活中必不可少的。
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