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- Eg: Food is essential to life (for the preservation of life). 食物对生命（对维持生命）是绝对必要的。
- Food is essential to life. 食物对生命是必不可少的。
- Sorrow is essential to life, and cannot be evaded. 痛苦是生命之根本，难以逃避。
- Air is essential to life. 生命不能缺少空气。
- It is essential to balance one's budget. 量入为出是很重要的。
- Mutual understanding is essential to friendship. 相互理解对友谊至关重要。
- I think that money is essential to life and we cannot do without money. 我认为.;钱对于生活来说是基本的;我们没钱就不能做事情
- Impartiality is essential to a judge. 公平是当法官所必需的。
- Protein is essential to life. 蛋白质是生命必不可少的。
- Hard work is essential to success. 成功必须努力工作。
- It is essential to rally the broad masses of the people round. 把广大人民群众团结起来是极为重要的。
- Getting enough vitamins is essential to life, although the body has no nutritional use for excess vitamins. 获得足够的维他命是生命必不可少的;尽管多余的维他命对身体是没有营养的用途的.
- Abstract: Glycosylation is one of the most important protein post-translational modification methods, which is essential to life and function of proteins. 摘要: 糖基化是蛋白质翻译后修饰最重要的方式之一，是必需的生理过程，对蛋白质生物学功能的正确发挥起着至关重要的作用。
- The trans-disciplinary theme of Grade 3 is “Sharing the planet”. Their central idea is: Water is essential to life, and is a limited resource for many people. 三年级学生探究单元的跨学科主题是共享地球，单元题目为“水”，中心思想是：水是生命的源泉，也是地球上一项有限的资源。
- They believe it is essential to defy convention. 他们认为反抗流俗是绝对必要的。
- In every dark hour of our national life, a leadership of frankness and vigor has met with that understanding and support of the people themselves, which is essential to victory. 凡在我国生活阴云密布的时刻，坦率而有活力的领导都得到过人民的理解和支持，从而为胜利准备了必不可少的条件。
- Phosphorus is essential to plant growth. 植物生长需要磷。
- Air is essential to all living things. 空气对一切生物都是必不可少的。
- Food is essential for life as it is the source of energy and nutrients. 食物是热量和营养素的来源,是维持生命不可或缺的要素。
- Water is essential to life. 水是生命所不可少的。
