Each tube is in front of the collector nozzle only long enough to discharge the processed air . 每一个管子在集气管前停留的时间，只要足以放出处理过的空气就可以了。
In fact fuels we burn and plant foods we eat give off their chemical energy in the form of heat energy . 其实我们烧的煤和吃的植物性食物都是以热能形式放出它们所含有的化学能。
Most familiar chemical changes do not involve so spectacular a liberation of energy as the zinc-sulfur reaction . 大多数化学反应并不象锌-硫反应那样会放出如此引人注目的能量。
Very few alpha particles from radioactive sources can travel more than 1 to 3 inches in air before being stopped . 在空气中从放射源放出的粒子在停止以前只有很少能穿过13英寸的距离。
A red glow hung near the summit and an occasional minor explosion created a king-size fireworks display from the crater . 山顶附近闪烁的红光和偶尔发生的小爆炸，构成从火山口放出的特大焰火。
Over the black tide, from an invisible ship, came the sound of a gramophone playing some popular heartrending tune . 越过黑乎乎的潮水，从一条望不见的船上传来留声机放出的令人心酸的流行小调。
"you are just egocentric. you never have any enthusiasm, you never come out with any spark towards me," she said, pondering . 她思考着说，“你自私自利。你从未有过激情，在我面前从未放出过什么生命的火花。”
Essentially the catalytic properties of clay minerals arise because of their ability to donate protons or accept electrons in reaction mechanisms . 从本质上看，粘土矿物具有催化性质，这是因为粘土矿物在反应过程中能放出质子或接受电子。
Even at the south pole the radiation received from the sun at midsummer's day equals the heat from a network of one-kilowatt electric fires, spaced five feet apart . 甚至在南极，夏至那天从太阳吸收的辐射热，也与互相间隔五英尺的一千瓦电炉组成的电炉网所放出的热量相等。
Because the beam formed by a tapered coupler is produced by many rays that emerge at slightly different angles, the outgoing beam is characterized by a relatively large divergence . 因为尖劈耦合器形成的光束是由许多出射角稍有不同的光线组成的，放出射光束的特点是具有较大的发散度。
