例句
While her team is confident that coal burning is causing the high rates of cancer, they are not certain it is due to silica.
她的团队相信，煤的燃烧导致了肺癌的高发病率，但是他们不能确定这是二氧化硅引起的。
While her team is confident that coal burning is causing the high rates of cancer, they are not certain it is due to silica.
她的团队相信，煤的燃烧导致了肺癌的高发病率，但是他们不能确定这是二氧化硅引起的。