每对双胞胎还分别报告了他们的皮肤在没有涂防晒霜的情况下晒伤或晒黑的情况、他们的体重、患皮肤癌、吸烟以及喝酒的历史。
Each of the twins also separately reported how their skin burned or tanned without sunscreen , their weight , and their history of skin cancer , smoking , and alcohol drinking .
吸烟的历史