translation.en: Occasionally, there were prizes, such as that given to John Harrison in the 18th century, for solving the so-called longitude problem, but prizes were only given after the fact, when they were given at all.
translation.zh: 偶尔会有奖金， 如约翰·哈里森在18世纪的时候 解决了所谓的“经度问题”而获得的奖金， 但是仅仅当工作完成之后 才能获得全部的奖金。