| 11. | Now she realizes that daring is an essential element of the job.
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| 12. | It is one of the essential elements that define a good attack.
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| 13. | Biological plausibility is an essential element of the intellectual background of epidemiology.
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| 14. | Atmospheric circumstances are another essential element to the success of the masquerade.
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| 15. | Civic groups, he argued, are an essential element of a democratic culture.
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| 16. | Catholics consider vocal prayer an essential element of the Christian life.
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| 17. | A coconut ( ) is an essential element of rituals in Hindu tradition.
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| 18. | Here they become an essential element of " Changing Rooms ."
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| 19. | Shapes and colors are the most essential elements in my paintings.
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| 20. | Germanium is not thought to be an essential element for any living organism.
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