1 The beam that is emitted by a laser differs in several ways from the light that comes out of a flashlight 发出的光束，在几个方面激光与从发出的光手电筒2The agreement on banning nuclear weapons is necessary for global peace关于禁止核武器是必要的，但世界和平3 Some foreign。
beneath this inversion were particles and gases emitted from factory chimneys in the London area， along with pollution which the winds from the east had brought from industrial areas on the continentEarly on 5 December in the London area， the sky was clear， winds were light and t。
while long wave infrared radiation emitted by earth#39s surface is absorbed， and then reemitted by trace gasesClimate changes occur in our earth#39s atmosphere due to a buildup of greenhouse gases Greenhouse gases can occur naturally as well as a result of human activities Problems。
