多洛式法则，如果物种的特质一旦失去，就意味着这种特质的永远失去。该法则由科学家路易斯•道罗在19世纪提出。
Dollo's Law, a theory proposed by the scientist Louis Dollo in the 1800s, states that when a particular trait is lost in a species, it never comes back.
业余歌迷们本不会关注乔.奥利弗（爵士乐大师路易斯·阿姆斯特朗的启蒙老师）这个狄更生式的人物（如果真有这么一种人存在的话）。在迈克尔死后的第四天，他利用一个新闻发布会创立了一个一种新的音乐形式。
Mere dilettantes might not have taken note of Papa Joe – a Dickensian character if ever there was one – since he used a press conference to promote a record label, four days after Michael's death.
泰勒必须进行一连串的补牙和矫正手术。路易斯的爸爸菲利浦．路易斯医师甚至要他在婚礼上戴「嵌入式美齿齿套」。
Taylor must have a series of fillings and cosmetic surgery, and Lewis's father, Dr Philip Lewis, even made him wear a 'snap-on smile' cosmetic denture for the wedding.
直到1912或，他都没有出版任，何与路易斯结构式有关的东西。
And, he didn't publish anything related to the Lewis structure until about 1912 or 1913.
直到1912或，他都没有出版任，何与路易斯结构式有关的东西。
And, he didn't publish anything related to the Lewis structure until about 1912 or 1913.
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