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。
Thermodynamics gives two important pieces of information needed in design, the heat liberated or absorbed during reaction and the maximum possible extent of reaction.
热力学给出设计中需要的两条重要的信息，在反应中会放出和吸收热量，而且最大值可能表示反应的程度。
The heat brings about a chemical reaction, and oxygen is liberated.
热量引起化学反应，释放出氧气。
Phenomenon whereby heat is liberated or absorbed at a junction when current passes from one metal to another.
当电流从一种金属流入另一种金属时，在结点处所发生的释放热或吸收热的现象。
In case the reaction is an exothermic change, you should remove the heat liberated.
假如该反应是放热变化，就应移走所放出的热。
Under some conditions chemical energy is liberated during a chemical reaction in forms other than heat.
在某些条件下，在化学反应期间，化学能还能以除了热能以外的其他形式释放出来。
Under some conditions chemical energy is liberated during a chemical reaction in forms other than heat.
在某些条件下，在化学反应期间，化学能还能以除了热能以外的其他形式释放出来。
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