The Formosa Fun Coast Water Park in New Taipei City burst into flames on the night of June 27, 2015 after colored powder was shot from the stage. Hundreds of tourists were burned and the Taiwanese therefore come to ＿＿（41）＿＿ the danger of dust. The five main causes of dust explosion are: large amounts of flammable dust disseminated in the air, source of ＿＿（42）＿＿ , poor ventilation, sufficient oxygen and careless use of powder. Health Business Weekly reports, many people believe the cause of this tragedy is lack of ＿＿（43）＿＿ knowledge and negligence of the danger of dust. Dust explosions are caused by flammable particles burning rapidly in a ＿＿（44）＿＿ space. If an indoor environment has sufficient oxygen where the dust is at a high ＿＿（45）＿＿ and meets a heat source, then there might be a chance of explosion.