indispensable
Word family nounindispensabilityadjectiveindispensableadverbindispensably
in·di·spen·sa·ble /ˌɪndɪˈspensəbəl◂/ ●○○ adjectiveadj NEEDUSEFULsomeone or something that is indispensable is so important or useful that it is impossible to manage without them 必需的,不可或缺的 SYN essentialindispensable to This book is indispensable to anyone interested in space exploration. 本书是任何对太空探险感兴趣的人必读的。
indispensable for/in (doing) something Meat is not indispensable for maintaining a healthy diet. 要想健康饮食,肉食并不是不可或缺的。
Mobile phones have become an indispensable part of our lives. 移动电话已经成为我们生活中的必需品。
► see thesaurus at useful indispensable• For mountain-climbing a really good sleeping-bag is indispensable.• If you're planning on going sightseeing around the old city, a guide is indispensable.• Police dogs have proved indispensable in the war on drugs.• She soon became an indispensable member of staff.• A knowledge of classical music is indispensable to anyone who wants to apply for this job.• The book will be indispensable to anyone who wishes to learn more about the British Royal Family.