1. Cold characters, need firewood to ignite? 冰冷的汉字要柴火点燃吗？
2. But Britain had coal, which replaced firewood as a fuel, and colonies with slaves providing plenty of farmland and cheap labour. 但是，英国使用煤炭，取代木柴作为燃料，并利用殖民地奴隶，获得大量的农田和廉价劳动力。
3. But trees, once planted, can die and decay or be chopped down for firewood, releasing the carbon they stored back into the atmosphere. 但是树木一旦种植可能会死亡，腐烂或是遭到为薪砍伐，从而向大气释放出原先贮存的碳。
