I guess it's because of the dry weather here. 我想因为这里干燥气候的关系。
Starting fires with a mischmetal flint in a dry climate is easy, but in wet weather, you may need a cigarette lighter and some flammable helpers to get your fire going. 用燧石生火在干燥气候下相对容易,但在潮湿天气里,你得用打火机和一些易燃物来帮助你生火。