We have had such a letter movement on two occasions in Denmark when more than a quarter of the adult Danish population participated. Such an achievement, however, demands a really great effort and also a great deal of money.
我们在丹麦曾有两次这样的写信运动，当时有四分之一以上的成年丹麦人参加。然而，这样的成就需要付出巨大的努力和大量的金钱。
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Population