raw material 原料 Coal and oil are raw materials for the plastics industry. 煤和石油是塑料工业的原料。 The raw material of an army is men. 军队的基本成分是士兵。 Nature is the raw material of poetry. 大自然给诗歌提供素材。 Perplexities are often the raw materials of discoveries. 令人困惑不解的难题往往导致重大发现。