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 goals that you’ll measure and monitor result from the application of each characteristic—milestones, actions, relationships, and schedules.
你所监测、监督的目标要具有上述每所有特点——阶段目标、行动、关系、日程。
3
Learn how to apply the open source tools cnee and Perl in applications to measure the characteristic attributes of how users manipulate the mouse.