Example sentences of "are essential for a [adj] " in BNC.

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1 Thankfully , major advances in the industry have been made , and this has led to placing emphasis on the fundamental elements that are essential for a successful roof , namely : good design , quality materials and regular maintenance .
2 Mirth , tranquillity and enthusiasm are not directly part of the transcendent world , yet they are essential to it , just as they are essential for a successful and happy life .
3 Trust and fidelity are essential for a lasting , successful relationship .
4 Extremely strong and well-developed back muscles are essential for a good and enduring gait .
5 Neither " fact " nor " fiction " are essential for a complete description of the world .
6 They are essential for a healthy nervous system and they give protection against infection , aid in energy production and promote growth .
7 It is unfortunate that the authors avoid mathematical formulae which are essential for a proper understanding of the experiments .
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