Jekyll and Hyde /ˈʤɛkələnˈhaɪd/ noun Learner's definition of JEKYLL AND HYDE
[singular]
: someone who is sometimes good and pleasant and sometimes very rude or bad两重性格交替出现的人；具有善恶双重性格的人 ◊ This term comes from “The Strange Case of Dr. Jekyll and Mr. Hyde,” a story by Robert Louis Stevenson. In the story, Dr. Jekyll is a scientist who creates a liquid that changes him from a good man to the evil Mr. Hyde when he drinks it.此词源自罗伯特·路易斯·史蒂文森的小说《化身博士》。小说中，杰凯尔博士是一名科学家，他发明了一种液体，喝了可以把自己从善良的人变成邪恶的海德先生。