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　　“The Strange Case of Dr. Jekyll and Mr. Hyde”is a novel by Robert Louis Stevenson. It is the story of a man who tries to separate2 the two sides of his nature (天性). The good side is Dr. Jekyll. The dark side is Mr. Hyde.

　　At first, the people who know Jekyll and Hyde do not understand that they are the same3 person. All they know is that Dr. Jekyll does good things, and Mr. Hyde does terrible things. For example,4 Hyde hurts a young girl in the street, but Jekyll gives money to her family.