Work and worry are indispensable elements of our daily lives.

工作和烦恼是我们日常生活中不可或缺的元素。

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The technique and the concept are two indispensable elements of a good painting.

对于一幅好画来说，技术和观念这两个要素缺一不可。

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Time, space and attribute are the three indispensable elements of geographical phenomenon.

时间、空间和属性是地理现象不可分割的三要素。

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Luther Perkins and his electric guitar playing are also indispensable elements of what makes this an amazing song.

NPR: Johnny Cash's 'Big River'

Security forces are indispensable now to the maintenance of order, but they have been compromised because certain elements have been accused of wanting to promote disorder elsewhere.

CNN: COMMUNAL FACE-OFF