indispensable
- adj. 不可缺少的；绝对必要的；责无旁贷的
- n. 不可缺少之物；必不可少的人
考试真题
- It is an indispensable device on an airplane.
出自-2010年6月阅读原文
- He deems it indispensable for combating global poverty.
出自-2016年6月阅读原文
- The automatic lift is indispensable in skyscrapers.
出自-2013年6月阅读原文
- But policies to help workers adapt will be indispensable.
出自-2018年考研阅读原文
- "Idleness is not just a vacation, an indulgence or a vice; It is as indispensable to be brain as vitamin D is to the body...[idleness] is, paradoxically, necessary to getting any work done," he argues.
2018年考研真题（英语二）阅读理解 Section Ⅱ