Translate the following paragraph into Chinese.Valentine's Day on February 14 is celebrated in various American and European countries. It is a holiday of love and romance usually by exchanging valentines or love tokens between lovers. There are different origins regarding the festival. One legend goes that the Romans put a priest named Saint Valentine into prison for refusing to believe in the Roman gods. On February 14, Valentine was put to death not only because he was Christian, but also because he had cured the jailer's daughter of blindness. The night before he was executed he wrote her a farewell letter signed "From your Valentine". Later, February 14 became a holiday for people to show affection for their loved ones. Today, people celebrate Valentine's Day in different ways, sending greeting cards and flowers, giving chocolate or other gifts, or joining in romantic dinners. The holiday has now become popular all over the world. In China the festival is also becoming increasingly popular with young people.