/kɔ:(r) ||; kɔr/noun1 [C] the hard centre of certain fruits, containing seeds 果心；果核: an apple core 苹果心
2 [sing] the central or most important part of sth 核心: the core curriculum (= the subjects that all pupils have to study) 核心课程What's the core issue here? 核心问题是什么？
3 [C] the central part of a planet 行星的核心: the earth's core 地核 ☞picture at seismic 见seismic插图
to the core completely; in every way 完全；彻底:
The news shook him to the core (= shocked him very much). 这消息把他吓坏了。