An idea or definition is a concept, not a percept.

一个理念或者定义是一种概念，而不是一种感知。

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Concept of interface definition.

接口定义的概念。

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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

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

Sensible enough in concept, the definition is maddeningly vague in application, largely because it is based upon a 1974 General Assembly resolution that was aimed at guiding state conduct, not defining individual criminal liability.

CENTERFORSECURITYPOLICY: The vague new crime of ��aggression��