形容词essentialrequirednecessaryvitalneeded

形容词dispensable

1. A library is indispensable to a college.
    大学里图书馆是必不可少的。

2. She''s become quite indispensable to the company.
    她已成了公司里少不了的人。

3. Water is indispensable to plants.
    水是植物不可缺少的。

4. Taking care of my parents is my indispensable duty.
    照顾父母，我责无旁贷。

1. indispensable的解释

1. 不可或缺：这时决定谁拥有游艇的所有权的关键因素在于1和2中谁拥有的专用型资产是不可或缺(Indispensable)的或不可替代的. 意即,如果厨师是市场上独一无二的,而船长市场是竞争性的,那么游艇的所有权就应该由厨师拥有,反之反是.

1. 必不可少的;不可或缺的
    If you say that someone or something is indispensable, you mean that they are absolutely essential and other people or things cannot function without them.

公共查询·英语单词

    e.g. She was becoming indispensable to him.
           他已变得越来越离不开她了。
    e.g. ...the indispensable guide for any traveller in France.
           在法国对任何游客来说都不可缺少的向导

1. unavoidable

    e.g. the routine but indispensable ceremonies of state

2. not to be dispensed with
    essential

    e.g. foods indispensable to good nutrition

3. absolutely necessary
    vitally necessary

    e.g. essential tools and materials
           funds essential to the completion of the project
           an indispensable worker

    Synonym: essential