They were using the laser to excite and ionize the atoms liberated by the heat of the flame in order to measure the characteristic emissions of different flames.
当时他们用这种激光来激发并电离那些被火焰的高温裂解出来的原子，目的是测量不同火焰的特征辐射。
2
The major characteristic of multi-burners opposed entrained-flow gasifier is impinging flame.
撞击火焰是多喷嘴对置式气流床气化炉的主要特征。
3
This paper introduced technique characteristic of current furnace flame detecting system and the digital image processing technique applied in flame detecting.