She knew nothing about the disease. She attributes his asthma to air pollution and says it is triggered quite easily by dust, cold, and pollution.
她当时对这种病一无所知，将孩子的病因归结于空气污染，认为灰尘、寒冷和污染非常容易诱发哮喘。
2
Silicosis is a disabling respiratory disease caused by inhaling silica dust, which is used in the production of glass products, optical fibers, cement, and more.