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indispensable
01
必不可少
absolutely necessary or crucial, to the point that being replaced or substituted is not possible
02
必不可少
radiography using X-rays and xerographic (rather than roentgenographic) techniques
03
必不可少
so important that cannot be managed without
04
必不可少
unavoidable
例子
Oxygen is indispensable for human life.
In modern society, the internet has become indispensable for communication and information.
The role of teachers is indispensable in educating future generations.
Honesty and integrity are indispensable qualities in a trustworthy leader.
Water is indispensable for the survival of all living organisms.