必不可少

Dream is the necessary psychal power in the common life.

理想在生活中是一种必的精神动力。

Many people believe that grammar is the sine qua non of language learning.

许多人习语法在习语言中是必的。

A good sleeping bag is an essential part of every campers equipment.

一个完好的睡袋是每个露宿者必的装备。

This is an indispensable part of his creed.

这是他的信条中必的一部。

Water is a necessity of life.

水是生命必的。

There are certain things that are absolutely basic to the maintenance of a good relationship.

要保持良好的关系, 有些条件是必的。

For a successful class humour is indispensable.

要在课堂上取得成功, 幽默是必的。

This is an indispensable book.

这是一本必的书。

The employer would provide lodgeable accommodation and other necessary facilities for the Second Party in manner of collectively.

雇主向乙方统一提供适宜居住的住宿和必的设施。

Control of the two main plantain diseases, yellow sigatoka (Micosphaerella musicola) and black sigatoka (Micosphaerella fijiensis), is indispensable.

对两种主要病害黄香蕉叶斑和黑香蕉叶斑病进行控制是必的。

In design I find the values of ergonomy, ecology, economy, ethics and esthetics equally important – they are all complementary parts in a successful design project.

在设计创作中，我发现功能化、生态、经济、道德和审美同等重要的价值观—它们都是一个成功地设计项目必的组成部。