1.
An exothermic reaction releases heat(energy).
放热反应释放出热量（能）。
2.
a heater that burns gas for heat.
燃烧气体放出热量的加热器。
3.
These give out heat all the time
这些元素不断释放出热量，
4.
Heat is always given out by one substance and taken in by another when heat-exchange takes place.
热交换发生时，总是某一物质放出热量，另一物质吸入热量。
5.
The process of oxidation in human body gives off heat slowly and regularly.
人体内的氧化过程缓慢而又有规则地放出热量。
6.
A fuel is a material which will burn at a reasonable temperature and produce heat.
燃料是一种物质，在适当温度下能够燃烧并放出热量。
7.
The radiator is giving out a lot of heat.
散热器释放出很多热量.
8.
In the process of solidification the same amount of heat is released.
在固结过程中则将释放出同等的热量。
9.
The heat brings about a chemical reaction,and oxygen is liberated.
热量引起化学反应,释放出氧气。
10.
The heat brings about a chemical reaction, and oxygen is liberated.
热量引起化学反应, 释放出氧气。
11.
Isotopes that emit radioactive particles; a stove emitting heat.
发射出放射性粒子的同位素；发出热量的炉子
12.
Heat released by the oxidation keeps the metal molten.
氧化过程中释放出来热量还能保持金属熔化。
13.
The sun is made of masses of hot gases, and when the hydrogen in its center is changed into helium, a huge amount of heat is given off.
太阳是由热气团构成的，当其中心处的氢变成氨时，便放出大量热能。
14.
In an adiabatic system, this heat release serves to increase the chamber temperature.
在一绝热系统中，放出的热量增加了燃烧室的温度。
15.
The electric heater radiated warmth.
电热器散发出来热量。
16.
a stove that sends forth great warmth.
释放出巨大热能的炉子
17.
The sun emits light and heat
太阳放射出光和热。
18.
Fireflies emit light but not heat.
萤火虫发光但不放出热。