凯撒斯劳滕大学机械工程专业；
Biography: Lothar Stein studied mechanical engineering at the University of Kaiserslautern;
在德国凯撒·斯劳滕大学进行的一个研究表明，有规律的喝黑咖啡有助于维持DNA的完整性。
A research conducted at the University of Kaiserslautern, Germany showed that drinking a dark roast coffee regularly contributes to DNA integrity.
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