Indispensable for the observer is a good star atlas, containing all naked eye stars . 观测者必须具备一份包括肉眼能看到的所有天体的好星图。
In certain circumstances, other theorems may be advantageous or even indispensable . 在某种情况下，用其它定理可能是有利的，甚至是不可缺少的。
Dr. morgenstern's indispensable assistance in this regard is gratefully acknowledged . 我们对于莫根施特恩博士在这方面给予的不可缺少的协助深表感谢。
These executives, expert in every phase of corporation, became the indispensable cogs in the industrial machine . 这些高层管理人员精通公司的各项业务，成为整个工业机器中不可缺少的齿轮。
These senior executives, expert in every phase of corporate activity, become the indispensable cogs in the industrial machine . 这些高层管理人员精通公司的各项业务，因而成为整个工业机器中不可缺少的轮齿。
Cherubic, unflappable, not quite successful in obscuring his penetrating intelligence behind the bland exterior of the perfect civil servant, brimelow became an indispensable part of the negotiations . 布赖姆洛成了谈判中必不可少的一员。他真诚而又镇静。这位地道的文职人员和善的外表无法完全掩饰他的深邃的智慧。
Love education - an indispensable part of modern education 现代教育的题中应有之义
Air , food and water are indispensable to life 空气，食物，水皆为生命不可缺者。
Fertile soil is indispensable for agriculture 肥沃土壤对农业而言是不可或缺的。
