Yeast is essential for the fermentation that produces alcohol.
酵母对酿酒的发酵是必要的。
Elections are essential for the sustenance of parliamentary democracy.
选举制度是维持议会民主所必不可少的。
Participating in the arts is essential for child development; encouraging children to express themselves in constructive ways could help to form healthy emotional responses in later life.
参与艺术活动对儿童发展至关重要；鼓励儿童以建设性的方式表达自己，有助于在以后的生活中形成健康的情绪反应。
They prevent fish migrations and change aquatic habitats essential for native species.
它们阻止了鱼类迁徙，并改变了对本地物种至关重要的水生栖息地。
It's true that high-school coding classes aren't essential for learning computer science in college.
诚然，高中编程课对于在大学学习计算机科学来说并不是必需的。
Indeed, it may be for any of the factors, physical as well as biotic, that are essential for organisms.
事实上，竞争对象可能是生命体所必须的任何生物或非生物因素。
Maintaining harmony at home is essential for the well-being of an individual, a couple and their offspring, and even the society.
维持家庭的和谐，对个人、夫妻、后代乃至整个社会都是至关重要的。
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.
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。
Dunbar is not against online relationships, but he maintains that face-to-face interaction is essential for the initial creation of true friendship and connections.
邓巴并不反对线上关系，但他坚持认为，面对面的交流对于最初建立真正的友谊和联系至关重要。
What parents do, in other words, is of deep concern to the state, for the obvious reason that caring for children is not only morally urgent but essential for the future of society.
换句话说，父母所做的事是国家所深切关注的，原因很明显，照顾孩子不仅在道德上是非常需要的而且对社会的未来至关重要。
Breathable, waterproof clothing is essential for most outdoor sports.
大多数户外运动衣服必须透气且防水。
Surplus snowfall is essential for a glacier to develop.
过剩的降雪是冰川形成的必要条件。
The ability of a species to compete and adapt to a gradually changing environment is not the only ability that is essential for survival.
一个物种竞争和适应逐渐变化的环境的能力并不是生存所必需的唯一能力。
Oxygen is essential for the metabolic process known as cell respiration that allows cells to efficiently harvest energy from organic food.
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。
People with Hunter syndrome lack the enzyme iduronate-2-sulfatase, which is essential for recycling complex carbohydrates.
患有Hunter综合征的人缺乏艾杜糖醛酸2-硫酸酯酶，这对于回收复杂的碳水化合物至关重要。
Learning to banish boredom is essential for Happiness.
学习如何驱除厌倦感对我们的快乐极其重要。
Maintaining high accounting standards is essential for business firms.
保持较高的会计标准对企业来说是非常重要的。
Plans might sound boring but they are essential for avoiding costly mistakes.
计划看起来显得枯燥无味，但他们是避免错误，节省成本的关键。
These CARDS are essential for those company workers that interact with clients.
这些名片对那些与客户有联系、在公司里工作的职员来说很关键。
Calcium is essential for healthy heart muscles and regulation of the heartbeat.
钙对心脏肌肉的健康至关重要，它调节心跳着的频率。
Maintaining high accounting standards is absolutely essential for business firms.
保持较高的会计标准对企业来说是非常重要的。
Comprehending the way abstract ideas relate to one another is essential for reading.
对于阅读，领会抽象概念相互联系的方法是很重要的。
Data should not be duplicated unless duplication is essential for practical reasons.
除非有实际的原因需要进行复制，否则不能够对数据进行复制。
When photographing insects, for instance, it's essential for the eyes to be sharp.
例如，在拍摄昆虫时，其犀利的眼睛是至关重要的。
As you can see, the ability to do well on things you don’t like is essential for success.
从文中可以看出，做好你不喜欢的工作的能力对于你走向成功是至关重要的。
Grassroots football remains essential for UEFA - healthy foundations mean a healthy elite.
草根足球仍是欧足联的根本——基础健康，精华才健康。
A free operating system is essential for people to be able to use computers in freedom.
一个免费的操作系统是人们可以自由使用计算机的基础。
It follows that unmanned programs are essential for the advancement of science in space.
为此，很有必要开展无人项目，以促进太空科学研究。
It follows that unmanned programs are essential for the advancement of science in space.
为此，很有必要开展无人项目，以促进太空科学研究。
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