indispensability什么意思？

indispensability的音标：indispensability的英式发音音标为：[ɪndɪspensə'bɪlɪtɪ]indispensability的美式发音音标为：[ɪndɪspensə'bɪlətɪ]...

This electric drill is a indispensability special equipment at rag trade.该电锁是服装工业不可缺少的专用设备之一.Body and mental state are two aspects of body indispensability, they are mutually to contact interaction.身体与心理是人体不可缺少的两个方面, 他们是...