•Government support will be essential if the project is to succeed.这个企划案能否成功，政府的支援至关重要。

•There is essential work to be done before the building can be re-occupied.这栋建筑在重新入住前必须进行必要的维修。

•Water is essential for/to living things.水对于生物来说是不可或缺的。

•[+ to infinitive] For the experiment to be valid, it is essential to record the data accurately.要保证实验的有效性，就必须精确地记录资料。

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•Because I live in a remote village, I regard my car as an essential.因为我住在一个偏远的村子里，所以我把汽车看作必需品。

•When we go on holiday, we only take the bare essentials.我们去渡假时，只带一些最基本的必需品。

•This leaflet will give you the essentials of how to use the word processor.这本小册子会告诉你使用文字处理器的基本知识。