amount of coal formed gass

例句：

1. 1. The amount of coalformed gass in the mine is asignificant factor in its safety.
   矿井中的煤形成气体量是其安全的一个重要因素。
2. 2. Theformation of coal gass is a complexprocess involving multiple factors.
   煤的形成是一个复杂的过程，涉及多个因素。
3. 3. The amountof coal gass producedby the plant is expected toincrease due to increased demand.
   由于需求的增加，该厂产生的煤形成气体量预计将增加。