Tobacco smoke is hazardous because it contains a number of unhealthy chemicals, including some 60 carcinogens (cancer-causing agents), tar, arsenic, carbon monoxide and nicotine.
吸烟之所以危害健康是因为烟草中含有多种损害健康的化学物质，包括60来种致癌物质、烟碱、砷、一氧化碳和尼古丁。
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