Tar sands and biofuels represent only a small part of global energy use.
沥青砂及生物燃料仅占全球能源消耗的一小部分。
Global public health experts say it remains a challenge to educate Africans about the risks of secondhand smoke, which contains dangerous compounds like tar, benzene and carbon monoxide.
世界卫生专家说，向民众宣导二手烟的祸害，在非洲还是不容易。二手烟包含危险物质，例如焦油、苯和一氧化碳等。
应用推荐