concept 与 conception
concept是“概念”，原来是哲学名词。现在用得比较广泛，但跟conception比较起来，总是带着一些学理的成分。
如假使把I had no conception of the importance of the task里的conception改作concept，便不自然。I wonder whether birds have the concept of climbing里用concept比用conception普通。The concept of obligation can be expressed by the use of such words as 'ought' and 'should'里用concept也比用conception普通。
