单词 | indispensable |
释义 | indispensableindispensableindispensable /ˌɪndɪˈspensəbəl◂/ adjective someone or something that is indispensable is so important or useful that you cannot manage without themindispensable toThe book is indispensable to anyone learning maths.belearnmath这本书是学习数学的人必读的。 |
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