The streaks that cut diagonally across them are " fireballs . "
斜穿过它们的条纹就是“火球”。
Firefighters spent four hours trying to seal the gas pipe , as orange fireballs spewed from a factory building roof .
消防员花了四个小时试图封堵输气管道,橙色的火球从一幢工厂建筑的屋顶中喷出。
It seems at least three individual fireballs were seen on the night of 16 may 2006 .
据说2006年5月16日晚人们看到了至少三个不同的火球。
For another , the artificial fireballs seem to be glowing because of the excitation of theatoms within the vaporised material rather than because of oxidation .