0 necessary; that cannot be done without -- ซึ่งขาดไม่ได้
A dictionary should be considered an indispensable possession.
As structural explanations are not inconsistent with ontological individualism, we conclude that both structural and individualist explanations are acceptable and indispensable.
Is it not necessary that one should complement the other, and must not their combination be indispensable to any adequate investigation of real life?
Musical literacy is a prominent feature of formal instrument tuition where it is regarded as an indispensable part of learning to play an instrument.
This is an indispensable reference book for all who have an interest in the genetic resources of cocoa.
It also alerts us to the signal role of ideological construction as an indispensable element of constitutional change.
In all these fields, a good reference collection of real specimens is, of course, indispensable.
Obviously, when such properties are of interest, operational methods are indispensable.
To clearly represent a relationship between required functions and realizing structure is indispensable for determining a platform and upgrade modules.
