When two or more elements combine and form a compound, a chemical change takes place.当两种或两种以上的元素结合形成化合物时,发生化学变化。
Many words are compounds, such as blackboard, inkpot, and the like.许多词是复合词,如blackboard, inkpot等等。
The compound was subdivided into four living areas.那个区域被划分成四块居住小区。
They blocked the compound gate.No one of the bandits got away.他们堵住了大门,匪徒一个也没跑掉。