flammable substance

例句：

1. 1. The gas is flammable and should be handled with care.
   这种气体易燃，应小心处理。
2. 2.The oil is combustible and must be stored in a cool, dry place.
   这种油是可燃的，必须储存在阴凉干燥的地方。
3. 3. Flammable liquids are dangerous if they come into contact with open flames.
   易燃液体如果与明火接触就非常危险。