Droogs are steep rocks which dot the surface of Mysore and Tamil Nadu, India.
He is the leader of a gang of "droogs" - the name given to his friends in the book's language Nadsat - a mix of Russian and English slang.
BBC: The history of the future in 10 images
英汉双解词典包含3185865条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。