以下为句子列表：
英文: The man who invented the telephone, Alexander Graham Bell, tried to help save Garfield's life by using electricity to locate the bullet which was in the President's back.
中文: 发明电话的亚历山大·格雷汉姆·贝尔先生试图挽救加菲尔德的生命，他用电来确认在总统背部的弹头位置。
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英文: Creating a magnetic field using electricity is easy: an electric current flowing in a wire generates a magnetic field around that wire.
中文: 用电流产生磁场容易：当电流在金属线圈流动时，磁场也随之产生。
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