Clear definition of concept is the premise of scientific research.

明确的概念界定是开展科学研究的前提。

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This paper introduces the definition of concept space, its significance and limitation in theory and practice.

文章介绍了概念空间的定义，它在理论上和实践中的重大意义和局限性。

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Since optimum logic does not give a strict definition of concept 'optimum', it USES a non-reflexive, asymmetric and transitive relation as its optimum relation.

由于择优逻辑对“优”的概念未给出严格定义，因而择优逻辑一般使用的优选关系是一种具有禁自返、反对称和传递性的关系。

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Liberal Democrat Lord Greaves tabled an amendment which would have forced the bill to include a more stringent commitment to promoting sustainable development, with a stricter definition of the concept.

BBC: Democracy Live site links

Under the changes, the partial murder defence of diminished responsibility has been replaced with "a modernised definition", based on the concept of "an abnormality of mental functioning which arose from a recognised medical condition", the ministry said.

BBC: Defence law changes for killing after domestic abuse

Our experience with this definition demonstrates that the concept of bookkeeping and other services is well understood in practice.

FORBES: KPMG No Longer Loaning Tax Staff To GE