# 正确选词：Concept 与 Idea

concept 的两个主要意义分别类似于 abstraction 或 construct 以及 understanding 或 comprehension。现由以下例句说明。

1. The concept of the infinitesimal limit played a key role in the development of calculus.
2. Scientists at that time yet had no concept of how to treat experimental uncertainty.

1. The idea of treating the input and the output on the same footing is quite novel.
2. In that paper, the authors develop an idea that was first discussed in Ref. [3].
3. I had no idea that you were coming.
4. His idea about how to proceed is quite unconventional.
5. I once had the idea of becoming an artist.