volatile matter content test

例句：

1. 1. The air was sothick with smoke that it was hard tobreathe.
   烟雾弥漫，呼吸都变得困难。
2. 2.The fire was so intense that it couldnot be extinguished.
   火势如此猛烈，无法扑灭。
3. 3. The oilspill was so large that it covered anarea of more than ten square kilometers.
   石油泄漏面积超过十平方公里。